Liquid Cooling Connection Device Facilitating Locking, Battery Pack and Electric Vehicle

Abstract

The present invention discloses a liquid-cooled connection device facilitating locking, a battery pack and an electric vehicle. The liquid-cooled connection device facilitating locking includes: a mounting seat disposed in a receiving cavity at the bottom of the electric vehicle or on the battery pack; and a connection valve fixed to the mounting seat, one end of the connection valve being connected to a liquid supply device and the other end being used for connection with a liquid-cooled pipeline; a moving component is provided on the mounting seat, and the moving component drives the connection valve to move synchronously when the locking shaft of the battery pack moves horizontally along an L-shaped locking groove at the bottom of the electric vehicle; the mounting seat includes a moving plate, and the moving component is disposed on the moving plate to achieve the moving connection of the connection valve relative to the moving plate. By means of the follow-up of the connection valve, problems such as unstable connection of the connection valve caused by the movement of the battery pack during the locking process are solved, and the safety and stability of the liquid-cooled connection device facilitating locking are greatly improved. The moving component enables the connection valve to move along a predetermined direction on the moving plate, ensuring the accuracy of the connection and improving the connection efficiency.

Description

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

[0002] The present invention relates to a liquid-cooled connection device, a battery pack, and an electric vehicle that are convenient for locking. Background Art

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

[0004] In a battery-swapping electric vehicle, a replaceable battery pack generally adopts a movable installation method, and the battery pack can be removed and replaced with a new one at any time. The cooling pipe provided on the quick-change battery pack is connected to the cooling system on the electric vehicle, and the heat balance of the quick-change battery pack is achieved by using the circulation of the coolant. However, the cooling pipe on the quick-change battery pack is rigidly connected to the electric vehicle. The battery-swapping electric vehicle needs to frequently and automatically replace the quick-change battery pack. In order to lock the battery pack on the electric vehicle, the battery pack needs to be moved during the locking process, resulting in deformation, misalignment, etc. at the connection between the cooling pipe of the battery pack and the cooling system of the electric vehicle, resulting in unstable connection of the cooling pipe, which may cause the connection to break and lead to leakage of the coolant. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect that the connection between the cooling pipe on the battery pack and the socket on the electric vehicle is unstable due to the movement of the battery pack during the locking process in the prior art, resulting in leakage of the coolant, and to provide a liquid-cooled connection device, a battery pack, and an electric vehicle that are convenient for locking.

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

[0007] A liquid-cooled connection device that is convenient for locking, used to realize the connection between the liquid supply device providing coolant on the electric vehicle and the liquid-cooled pipeline in the battery pack, so as to introduce the coolant into the liquid-cooled pipeline in the battery pack, includes:

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

[0009] A connection valve is fixed to the mounting seat. One end of the connection 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 connection valve, and the flow direction of the flow channel is perpendicular to the plane direction of the body length direction 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 on the electric vehicle in the bottom-up direction;

[0010] A moving component is provided on the mounting seat. When the locking shaft of the battery pack moves horizontally along the L-shaped locking groove at the bottom of the electric vehicle, the moving component drives the connection valve to move synchronously;

[0011] The mounting seat includes a moving plate, and the moving component is arranged on the moving plate to realize the moving connection of the connection valve relative to the moving plate.

[0012] In this solution, adopting the above structural form, the connection valve that seals and connects the liquid cooling pipeline of the battery pack and the liquid supply device of the electric vehicle follows the movement of the battery pack through the moving component, and then keeps the relative position with the battery pack unchanged. By the way of the connection valve following movement, the problems such as unstable connection of the connection valve caused by the movement of the battery pack during the locking process are solved, greatly improving the safety and stability of the electric vehicle. At the same time, through the moving component, the connection valve moves along a predetermined direction on the moving plate, ensuring the accuracy of the connection and improving the connection efficiency.

[0013] Preferably, the mounting seat further includes a fixing plate for fixing the connection valve, and the moving component includes a slider and a guide rail arranged between the fixing plate and the moving plate.

[0014] In this solution, adopting the above structural form, the connection valve is installed and fixed on the fixing plate, and then the slider and the guide rail are respectively connected to the fixing plate and the moving plate to realize the movement of the fixing plate on the moving plate. The structure is simple, the installation is convenient, and the cost is low. At the same time, the slider moves along a predetermined direction on the guide rail, effectively avoiding the phenomenon of offset and dislocation of the fixing plate and the connection valve during the movement, ensuring the accuracy, sealing performance and connectivity of the liquid cooling connection.

[0015] Preferably, the connection valve is arranged in the middle area of the fixing plate, and the moving component includes two sliders arranged on the fixing plate on both sides of the connection valve and two guide rails arranged at the corresponding positions on the moving plate.

[0016] In this solution, adopting the above structural form, the force distribution of the fixing plate is symmetrical, ensuring the consistency of the movement process and not tilting, realizing that the fixing plate and the connection valve move more smoothly during the movement, and ensuring the accuracy, sealing performance and connectivity of the liquid cooling connection.

[0017] Preferably, a positioning component is provided on the mounting base, and the connection valve and the battery pack or the bottom of the electric vehicle are positioned through the positioning component.

[0018] In this solution, adopting the above structural form, when the connection valve is connected to the liquid supply device or the liquid cooling pipeline, it is positioned through the positioning component, ensuring the accuracy of the connection and improving the connection efficiency.

[0019] Preferably, the mounting base further includes a fixed base forming a cavity, and the moving plate is floatingly arranged in the cavity. During the installation process of the battery pack, the positioning component is positioned through the floating action of the moving plate.

[0020] In this solution, adopting the above structural form, when the moving plate moves in the cavity, it will drive the fixed plate and the connection valve to move together, ensuring that the positioning component on the mounting base can be quickly and accurately positioned during the installation process of the battery pack, improving the connection efficiency of the connection valve; at the same time, it can further increase the moving amount of the connection valve, ensuring the stability of the connection between the connection valve and the liquid supply device and the liquid cooling pipeline, and improving the installation stability of the liquid cooling connection device that is convenient for locking.

[0021] Preferably, the mounting base further includes a plurality of elastic members, and the plurality of elastic members are respectively connected to the corresponding corner positions of the fixed base from the corner positions of the moving plate.

[0022] In this solution, adopting the above structural form, by respectively connecting the plurality of elastic members to the corner positions of the moving plate, the moving plate can move in the fixed base. At the same time, the plurality of elastic members will act on the four sides of the moving plate respectively, ensuring the movement and rebound of the moving plate, and improving the stability of the liquid cooling connection device that is convenient for locking.

[0023] Preferably, the elastic member is a tension spring.

[0024] In this solution, adopting the above structural form, it has high stability, simple structure and low cost.

[0025] Preferably, the fixed base further includes a cover plate arranged on the opening side of the cavity and penetrated by the connection valve, and a sealing sleeve sealed between the cover plate and the pipe wall of the connection valve. The sealing sleeve has a preset expansion space.

[0026] In this solution, adopting the above structural form, the sealing sleeve plays a sealing role. The opening between the cover plate and the pipe wall of the connection valve is sealed through the sealing sleeve, effectively preventing external dust, water vapor, impurities, etc. from entering the cavity, and greatly improving the installation stability of the liquid cooling connection device that is convenient for locking. At the same time, the sealing sleeve has a preset expansion space, enabling the sealing sleeve to expand and contract when the connection valve moves, thus ensuring the sealing effect.

[0027] Preferably, the sealing sleeve has a corrugated portion.

[0028] In this solution, the above structure is adopted, and the corrugated portion enables the sealing sleeve to have elasticity and be telescopic, which is convenient for processing and manufacturing and has a low cost.

[0029] A battery pack includes the liquid cooling connection device that is convenient for locking as described above.

[0030] In this solution, the above structure is adopted. The moving part makes the connection valve that seals and connects the liquid cooling pipeline of the battery pack and the liquid supply device of the electric vehicle follow the movement of the battery pack, and then keeps the relative position with the battery pack unchanged. By the way of the connection valve following, the problems such as unstable connection of the connection valve caused by the movement of the battery pack during the locking process are solved, greatly improving the safety and stability of the electric vehicle. At the same time, the moving part makes the connection valve move along a predetermined direction on the moving plate, ensuring the accuracy of the connection and improving the connection efficiency.

[0031] An electric vehicle includes the liquid cooling connection device that is convenient for locking as described above.

[0032] In this solution, the above structure is adopted. The moving part makes the connection valve that seals and connects the liquid cooling pipeline of the battery pack and the liquid supply device of the electric vehicle follow the movement of the battery pack, and then keeps the relative position with the battery pack unchanged. By the way of the connection valve following, the problems such as unstable connection of the connection valve caused by the movement of the battery pack during the locking process are solved, greatly improving the safety and stability of the electric vehicle. At the same time, the moving part makes the connection valve move along a predetermined direction on the moving plate, ensuring the accuracy of the connection and improving the connection efficiency.

[0033] On the basis of conforming to the common knowledge in the art, the above preferred conditions can be combined arbitrarily to obtain various preferred examples of the present invention.

[0034] The positive and progressive effects of the present invention are as follows: The moving part makes the connection valve that seals and connects the liquid cooling pipeline of the battery pack and the liquid supply device of the electric vehicle follow the movement of the battery pack, and then keeps the relative position with the battery pack unchanged. By the way of the connection valve following, the problems such as unstable connection of the connection valve caused by the movement of the battery pack during the locking process are solved, greatly improving the safety and stability of the liquid cooling connection device that is convenient for locking. At the same time, the moving part makes the connection valve move along a predetermined direction on the moving plate, ensuring the accuracy of the connection and improving the connection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the liquid cooling connection assembly in Embodiment 1 according to the present invention;

[0036] Figure 2 Schematic structural diagram of the first liquid cooling connection device in Embodiment 1 according to the present invention;

[0037] Figure 3 Schematic structural diagram of the second liquid cooling connection device in Embodiment 1 according to the present invention;

[0038] Figure 4 Schematic diagram of the first installation method of the battery - end liquid cooling connection device in Embodiment 2 according to the present invention on the battery pack;

[0039] Figure 5 Schematic diagram of the first installation method of the vehicle - end liquid cooling connection device in Embodiment 3 according to the present invention on the battery installation part;

[0040] Figure 6 Stereoscopic structural diagram of the liquid cooling connection device facilitating locking in Embodiment 4 according to the present invention;

[0041] Figure 7 Front - view structural diagram of the liquid cooling connection device facilitating locking in Embodiment 4 according to the present invention;

[0042] Figure 8 Right - view structural diagram of the liquid cooling connection device facilitating locking in Embodiment 4 according to the present invention;

[0043] Figure 9 Internal - structure diagram of the liquid cooling connection device facilitating locking in Embodiment 4 according to the present invention;

[0044] Figure 10 Partial - structure diagram of the liquid cooling connection device facilitating locking in Embodiment 4 according to the present invention;

[0045] Figure 11 Partial - structure diagram of the liquid cooling connection device facilitating locking in Embodiment 4 according to the present invention from another perspective. Detailed implementation manners

[0046] The present invention will be more clearly and completely described below by way of embodiments in conjunction with the drawings, but the present invention is not limited to the scope of the embodiments thereby.

[0047] Embodiment 1

[0048] As Figures 1 to 3 shown, Embodiment 1 discloses a liquid - cooling connection assembly 5000, which is used between a liquid - supply device and a liquid - cooling pipeline. Through the liquid - cooling connection assembly 5000, the connection between the liquid - supply device and the liquid - cooling pipeline is realized, enabling the coolant in the liquid - supply device to flow into the liquid - cooling pipeline and then return to the liquid - supply device, thereby achieving heat exchange in the area where the liquid - cooling pipeline is arranged.

[0049] Specifically, the liquid cooling connection assembly 5000 includes a first liquid cooling connection device 5100 and a second liquid cooling connection device 5200. The first liquid cooling connection device 5100 and the second liquid cooling connection device 5200 are used in cooperation. One of them is set as the connection joint of the liquid supply device, and the other is set as the connection joint of the liquid cooling pipeline. Through the liquid cooling connection assembly 5000, a sealed connection is achieved while the liquid cooling pipeline is conducted, so that the coolant can flow.

[0050] As Figure 1 and 2 shown, the first liquid cooling connection device 5100 includes a first mounting seat 5110 and a first connection valve 5120.

[0051] As Figure 1 and 3 shown, the second liquid cooling connection device 5200 includes a second mounting seat 5210 and a second connection valve 5220.

[0052] The first mounting seat 5110 is a flat plate-like structure, specifically rectangular, and is used to mount and fix the first connection valve 5120.

[0053] The first connection valve 5120 is fixed on the first mounting seat 5110. An openable and closable flow channel is formed inside the first connection valve 5120, and the flow direction of the flow channel is perpendicular to the plane direction of the first mounting seat 5110.

[0054] The second mounting seat 5210 is a flat plate-like structure, specifically rectangular, and is used to mount and fix the second connection valve 5220.

[0055] The second connection valve 5220 is fixed on the second mounting seat 5210. An openable and closable flow channel is formed inside the second connection valve 5220, and the flow direction of the flow channel is perpendicular to the plane direction of the second mounting seat 5210.

[0056] In actual use, one end of the first connection valve 5120 is connected to the liquid cooling pipeline, and one end of the second connection valve 5220 is connected to the liquid supply device. Through the cooperative connection of the first connection valve 5120 and the second connection valve 5220, the flow channels inside the first connection valve 5120 and the second connection valve 5220 are opened simultaneously, so that the coolant in the liquid supply device can flow into the liquid cooling pipeline.

[0057] As Figure 2 shown, the first connection valve 5120 includes a first housing 5121 with a flow channel formed inside and a first valve core 5122 that is telescopically and movably arranged inside the flow channel to open and close the flow channel.

[0058] The first housing 5121 is an aerial structure, having a first end and a second end arranged along the flow direction. The first end is an open structure, and a plurality of through holes are provided on the second end. A flow passage is formed between the open structure and the plurality of through holes.

[0059] The first valve core 5122 includes a first core body 5122a extending from the first end of the first housing 5121 to the second end, and a valve plug 5122b that is telescopically movable and sleeved on one end of the first core body 5122a corresponding to the first end and is used to seal the first core body 5122a and the first housing 5121. The flow passage is opened or closed by the telescopic movement of the valve plug 5122b.

[0060] As Figure 3 shown, the second connection valve 5220 includes a second housing 5221 with a flow passage formed inside and a second valve core 5222 that is telescopically movable and arranged inside the flow passage to open and close the flow passage.

[0061] The second housing 5221 is an aerial structure, and the outer diameter of the second housing 5221 matches the inner diameter of the first housing 5121. The second housing 5221 also has a first end and a second end arranged along the flow direction. The first end is an open structure, and a plurality of through holes are provided on the second end. A flow passage is formed between the open structure and the plurality of through holes.

[0062] One end of the second valve core 5222 is fixedly connected to the first end of the second housing 5221, and the other end is telescopically movably connected to the second end of the second housing 5221 inside the flow passage. The second valve core 5222 is sealingly connected to the first end, and the corresponding flow passage is opened or closed by the telescopic movement of the second valve core 5222.

[0063] Another example is Figure 2 shown. The first mounting seat 5110 is provided with a first positioning member 5130. As Figure 3 shown, the second mounting seat 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, positioning is performed through the first positioning member 5130 and the second positioning member 5230 to ensure the accuracy of the connection and improve the connection efficiency. Specifically, the specific structural form of the first positioning member 5130 can be two positioning holes respectively arranged on both sides of the first connection valve 5120, and the specific structural form of the second positioning member 5230 can be two positioning posts respectively arranged on both sides of the second connection valve 5220; or the first positioning member 5130 and the second positioning member 5230 can be arranged in the opposite way, or other positioning structures can be adopted to meet the positioning requirements.

[0064] Another example is Figure 2As shown, the end face of the first core body 5122a is recessed at a predetermined depth position on the first end face of the first end portion. A guiding structure is provided in the area where the first housing 5121 is higher than the end face of the first core body 5122a. This guiding structure can be a guiding inclined plane. Of course, it can also be any other structure with a guiding function. In this way, while the first positioning member 5130 and the second positioning member 5230 achieve positioning, the guiding structure at the front end of the first core body 5122a can enable more precise docking of the second connection valve 5220 and the first connection valve 5120, improving the sealing connection efficiency.

[0065] When the first connection valve 5120 is connected to the second connection valve 5220, the edge of the second housing 5221 pushes against the valve plug 5122b of the first valve core 5122 to cause the valve plug 5122b to retract inward relative to the first core body 5122a. At the same time, the first core body 5122a pushes against the second valve core 5222 to cause the second valve core 5222 to retract toward the inside of the second housing 5221, so that the flow channels of the first housing 5121 and the second housing 5221 are opened simultaneously, and since the second housing 5221 is inserted into the first housing 5121, a sealed connection between the first housing 5121 and the second housing 5221 is achieved.

[0066] As Figure 3 shown, a sealing ring 5240 is also provided on the second mounting seat 521 and is arranged around the second connection valve 5220. After the first connection valve 5120 is connected to the second connection valve 5220, the sealing ring 5240 is squeezed to keep the first mounting seat 5110 and the second mounting seat 5210 in a sealed connection, ensuring the sealing performance of the first connection valve 5120 and the second connection valve 5220. In this way, even if there is a slight liquid leakage phenomenon, it can be ensured that the liquid will not leak out and pose a threat or impact to other components in the use environment.

[0067] According to the liquid cooling connection assembly 5000 of this Embodiment 1, through the matching connection of the first liquid cooling connection device 5100 and the second liquid cooling connection device 5200, the openable / closable connectivity and sealing performance of the flow channel are ensured, avoiding risks such as coolant dripping. This liquid cooling connection assembly 5000 can be applied to all environments where liquid cooling pipeline connection is achieved, such as the pipeline connection between the battery pack of an electric vehicle and the liquid supply device on the vehicle, etc.

[0068] In another embodiment, the sealing ring can also be arranged on the first mounting seat, and a sealed connection can also be achieved, which can be set arbitrarily according to actual requirements.

[0069] Embodiment 2

[0070] As Figure 4As shown in the figure, Embodiment 2 discloses a battery pack 6000, which is used in an electric vehicle to provide power for the electric vehicle. And the battery pack 6000 has the first liquid-cooling connection device 5100 or the second liquid-cooling connection device 5200 with the structure in Embodiment 1 above. The first liquid-cooling connection device 5100 or the second liquid-cooling connection device 5200 is provided on the battery pack 6000 as a battery-end liquid-cooling connection device. In this battery-end liquid-cooling connection device, the first mounting seat 5110 and the second mounting seat 5210, as well as the first connection valve 5120 and the second connection valve 5220, are collectively referred to as the mounting seat and the connection valve.

[0071] 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 on the electric vehicle that provides coolant, so as to introduce the coolant into the liquid-cooling pipeline in the battery pack 6000, so as to exchange heat with the battery modules during the charging and discharging process in the battery pack 6000 and provide a suitable working temperature environment for the battery pack 6000. Here, the liquid supply device on the electric vehicle is connected with 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 a liquid-cooling pipeline. That is to say, the first liquid-cooling connection device 5100 or the second liquid-cooling connection device 5200 is respectively connected between the battery pack 6000 and the electric vehicle, and the two can be interchangeably arranged.

[0072] Specifically, the mounting seat is arranged on the top surface or the side surface of the battery pack 6000, the connection 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 passage of the connection valve, so as to realize the connection with the liquid-cooling pipeline of the electric vehicle after the battery pack 6000 is installed on the electric vehicle in the bottom-up direction. One end of the connection valve located inside the battery pack 6000 is connected to the liquid-cooling pipeline in the battery pack 6000, and the other end is used to be connected to the liquid supply device. The liquid supply device here refers to the liquid supply device that provides coolant in the electric vehicle or the liquid supply device arranged on the battery charging rack.

[0073] Here, the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device. The locking device includes a plurality of locking shafts fixed on both sides of the battery pack 6000 and a locking mechanism arranged on the vehicle and having locking grooves extending in the vertical direction. When the battery pack 6000 rises from the bottom of the electric vehicle until the locking shafts on the battery pack 6000 are engaged with the locking grooves of the locking device, the liquid-cooling connection device of the liquid supply device of the electric vehicle is hermetically connected to the battery-end liquid-cooling connection device on the battery pack 6000 and the flow passage of the connection valve is opened to communicate with each other.

[0074] According to the battery pack 6000 of Embodiment 2, during the process of installing the battery pack 6000 at the bottom of an electric vehicle, the battery pack 6000 is lifted from bottom to top. As the battery pack 6000 continues to rise, the corresponding connection valves between the liquid cooling connection device on the liquid supply device of 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 in place, that is, the locking shaft is locked in the corresponding locking groove, the connection valve on the battery pack 6000 is also simultaneously in sealed communication with the liquid supply device on the electric vehicle, enabling the sealed connection of the liquid cooling pipeline while realizing the installation of the battery pack 6000, and the installation and connection process is simple and efficient.

[0075] According to the solution of Embodiment 2, by fixing the mounting seat horizontally relative to the battery pack 6000 and setting the flow direction of the flow channel of the connection valve perpendicular to the mounting seat, it is possible to achieve rapid sealed connection between the liquid cooling connection device of the battery pack 6000 and the liquid cooling pipeline of the electric vehicle when the battery pack 6000 is lifted in place.

[0076] In another embodiment, the battery pack 6000 has all the features of the above embodiments, and further includes a moving component provided on the mounting seat. The connection valve is movably arranged on the moving component, and when the locking shaft moves horizontally along the L-shaped locking groove, it drives the connection valve to move in the opposite direction relative to the moving component. This solution is based on the fact that the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device. The locking device includes a locking mechanism with an L-shaped locking groove and a locking shaft fixed on the side of the battery pack 6000. After the locking shaft moves vertically along the L-shaped locking groove in place, it further moves horizontally until the battery pack 6000 is locked successfully, that is, the battery pack 6000 is locked by further horizontal movement after vertical movement. When the battery pack 6000 rises to the in-place position, the liquid cooling connection device of the battery pack 6000 and the liquid cooling connection device of the electric vehicle are already in sealed communication. 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 stationary through the moving component, that is, the connection valve of the battery pack 6000 moves in the opposite direction relative to the moving component to ensure the accuracy, sealing performance, and connectivity of the liquid cooling connection.

[0077] In another embodiment, the battery pack 6000 has all the features of the above 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 arrangement mode of the liquid cooling pipeline 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 occupied space of the liquid cooling pipeline, and improve the heat exchange efficiency.

[0078] In another embodiment, the battery pack 6000 has all the features of the above embodiments, and further has a battery-end electrical connector. Among them, 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 adjacent to the two side surfaces respectively. The battery-end electrical connector has all or part of the features of the battery-end electrical connector for battery swapping. In another embodiment, the battery-end liquid cooling connection device can also be arranged on the same fixing seat as the battery-end electrical connector.

[0079] In another embodiment, the battery pack 6000 has all the features of the above embodiments, and further includes a battery hanging part. Among them, the battery hanging part is installed on the top of the battery pack body. 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.

[0080] In another embodiment, the battery pack 6000 has all the features of the above embodiments, and further has a plurality of locking shafts 6200. The plurality of locking shafts are axially and perpendicularly connected to the opposite side surfaces of the battery pack body 6100. The locking shafts 6200 are used to cooperate with the locking mechanism on the electric vehicle to lock the battery pack.

[0081] Embodiment 3

[0082] As Figure 5 shown, this Embodiment 3 discloses a battery installation part 7000, which is used on an electric vehicle to install the battery pack 6000 on the electric vehicle. The battery installation part 7000 has the first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 described in Embodiment 1 above. The first liquid cooling connection device 5100 or the second liquid cooling connection device 5200 is arranged on the battery installation part 7000 as a vehicle-end liquid cooling connection device. In this vehicle-end liquid cooling connection device, the first mounting seat 5110 and the second mounting seat 5210, and the first connection valve 5120 and the second connection valve 5220 Collectively referred to as the installation seat and connection valve.

[0083] When the battery installation part 7000 is connected to the battery pack 6000, the vehicle-end liquid cooling connection device and the battery-end liquid cooling connection device on the battery pack 6000 are in a sealed communication state, so as to introduce the coolant provided by the liquid supply device on the electric vehicle into the liquid cooling pipeline in the battery pack 6000, so as to exchange heat with the battery modules during the charging and discharging process in the battery pack 6000 and provide a suitable working temperature environment for the battery pack 6000. Here, the liquid cooling pipeline on the battery pack 6000 is connected with a second liquid cooling connection device 5200 or a first liquid cooling connection device 5100 that matches the vehicle-end liquid cooling connection device on the electric vehicle. That is to say, the battery pack 6000 and the battery installation part of the electric vehicle are respectively connected with a first liquid cooling connection device 5100 or a second liquid cooling connection device 5200, and the two can be interchangeably arranged.

[0084] Specifically, the mounting seat is arranged on the top surface or side surface of the accommodation cavity of the electric vehicle, the connection valve is fixed on the mounting seat, the plane direction of the mounting seat is 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 passage of the connection valve. That is to say, the flow direction of the flow passage is perpendicular to the plane direction where the vehicle body length direction of the electric vehicle is located, so as to realize the connection with the liquid cooling pipeline of the electric vehicle after the battery pack 6000 is installed on the electric vehicle in the bottom-up direction.

[0085] Here, the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device. The locking device includes a plurality of locking shafts fixed on both sides of the battery pack 6000 and a locking mechanism arranged on the vehicle and having locking grooves extending in the vertical direction. When the battery pack 6000 rises from the bottom of the electric vehicle until the locking shafts on the battery pack 6000 cooperate with the locking grooves of the locking device, the vehicle-end liquid cooling connection device on the electric vehicle is connected to the battery-end liquid cooling connection device on the battery pack 6000 and the flow passage of the connection valve is opened.

[0086] According to the battery installation part of Embodiment 3, during the process of installing the battery pack 6000 to the bottom of the electric vehicle, the battery pack 6000 is lifted from bottom to top. 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 on the battery pack 6000 gradually abut from the initial contact state to a sealed connection and open the flow passage; when the battery pack 6000 is lifted in place, that is, the locking shafts are locked in the corresponding locking grooves, the vehicle-end liquid cooling connection device and the battery-end liquid cooling connection device are also simultaneously in sealed communication, and the sealed connection of the liquid cooling pipeline can be realized while the battery pack 6000 is installed, and the installation and connection process is simple and efficient.

[0087] According to the solution of Embodiment 3, by fixing the mounting base horizontally relative to the electric vehicle and setting the flow direction of the flow passage of the connection valve perpendicular to the mounting base, it is possible to achieve rapid sealed connection between the connection valve and the liquid-cooled connection joint of the battery pack 6000 while the battery pack 6000 is lifted upward in place.

[0088] In another embodiment, the battery mounting portion 7000 has all the features of the above embodiments, and further includes a moving member provided on the mounting base. The moving member is used to drive the overall movement of the mounting base. When the locking shaft moves horizontally along the L-shaped locking groove, it drives the overall synchronous movement of the mounting base and the connection valve. This solution is based on the fact that the battery pack 6000 is detachably connected to the bottom of the electric vehicle through a locking device. The locking device includes a locking mechanism with an L-shaped locking groove and a locking shaft fixed on the side of the battery pack 6000. After the locking shaft moves vertically along the L-shaped locking groove and reaches the position, it further moves horizontally until the battery pack 6000 is locked successfully, that is, the battery pack 6000 is locked by further horizontal movement after vertical movement. When the battery pack 6000 rises to the in-place position, the battery-side liquid-cooled connection device of the battery pack 6000 has been sealed and connected to the vehicle-side liquid-cooled connection device of the electric vehicle. Therefore, when the battery pack 6000 moves horizontally, the overall movement of the vehicle-side liquid-cooled connection device is driven by the moving member to keep the liquid-cooled connection device of the battery pack 6000 in the same position as the liquid-cooled connection device of the electric vehicle, ensuring the sealing and connectivity of the liquid-cooled connection.

[0089] In another embodiment, the battery mounting portion 7000 has all the features of the above embodiments, and further has: the number of vehicle-side liquid-cooled connection devices is two, one of which is used as the input portion of the coolant and the other is used as the output portion of the coolant. By separately arranging the input portion and the output portion of the liquid-cooled connection device, while making the liquid-cooled optical path setting on the electric vehicle more flexible, the way of arranging the liquid-cooled pipelines inside the battery pack 6000 is also made more flexible. Preferably, the two vehicle-side liquid-cooled connection devices are respectively arranged at opposite ends of the accommodation cavity of the electric vehicle. Arranging the input portion and the output portion of the liquid-cooled connection device at both ends of the accommodation cavity of the electric vehicle can optimize the layout of the liquid-cooled pipelines on the electric vehicle while also optimizing the layout of the liquid-cooled pipelines in the battery pack 6000, reducing the occupied space of the liquid-cooled pipelines and improving the heat exchange efficiency.

[0090] In another embodiment, the battery mounting portion 7000 has all the features of the above embodiments, and further has a vehicle-side electrical connector. Among them, the fixed side of the vehicle-side electrical connector is connected to the top or end of the battery accommodation cavity, and the ends are adjacent to both sides respectively. The vehicle-side electrical connector has all or part of the features of the vehicle-side electrical connector. In another embodiment, the vehicle-side liquid-cooled connection device can also be arranged on the same mounting base as the vehicle-side electrical connector.

[0091] In another embodiment, the battery mounting portion 7000 has all the features of the above embodiments and further includes a battery hanging seat. The battery hanging seat is mounted on the top of the battery accommodating cavity. The battery hanging member has all or part of the features of the first hanging seat in the battery mounting portion, or the battery hanging member has all or part of the features of the second hanging seat in the battery mounting portion.

[0092] In another embodiment, the battery mounting portion 7000 has all the features of the above embodiments and further includes a locking mechanism 7100. The locking mechanism 7100 is correspondingly arranged with the locking shafts on both sides of the battery pack 6000, and the battery pack 6000 is locked by locking the locking shafts.

[0093] Embodiment 4

[0094] As Figures 6 to 11 shown, Embodiment 4 of the present disclosure discloses a liquid-cooled connection device facilitating locking, which is used to connect a coolant supply device provided on an electric vehicle and a liquid-cooled pipeline in a battery pack, so as to introduce the coolant into the liquid-cooled pipeline in the battery pack. The liquid-cooled connection device facilitating locking can be installed on the electric vehicle and connected to the coolant supply device on the electric vehicle. After being connected to the liquid-cooled pipeline of the battery pack, the coolant provided by the supply device flows into the liquid-cooled pipeline of the battery pack through the liquid-cooled connection device facilitating locking, so as to adjust the temperature of the battery pack. In addition, the liquid-cooled connection device facilitating locking can also be installed on the battery pack and connected to the liquid-cooled pipeline on the battery pack. After being connected to the coolant supply device on the electric vehicle, the coolant provided by the supply device is conducted to flow into the liquid-cooled pipeline of the battery pack, so as to adjust the temperature of the battery pack.

[0095] The liquid-cooled connection device facilitating locking includes a mounting seat 1 and a connection valve 2. The mounting seat 1 is arranged in a receiving cavity at the bottom of the electric vehicle or on the battery pack; the connection valve 2 is fixed on the mounting seat 1. One end of the connection valve 2 is connected to the supply device, and the other end is used to be connected to the liquid-cooled pipeline. A switchable flow channel is formed inside the connection valve 2, 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 connect the supply device and the liquid-cooled pipeline after the battery pack is installed on the electric vehicle from bottom to top. The supply device flows the provided coolant into the connection valve 2. By opening the connection valve 2, the coolant flows into the liquid-cooled pipeline, so as to cool down the battery pack. In Embodiment 4, the number of connection valves 2 is two. One connection valve 2 is used for the entry of the coolant, and the other connection valve 2 is used for the discharge of the coolant, so as to enable the liquid-cooled connection device facilitating locking to perform circulating cooling.

[0096] The mounting base 1 is provided with a moving component 11. When the locking shaft of the battery pack moves horizontally along the L-shaped locking groove at the bottom of the electric vehicle, the moving component 11 drives the connecting valve 2 to move synchronously. This solution is based on the fact that the battery pack is detachably connected to the bottom of the electric vehicle through a locking device. The locking device includes a locking mechanism with an L-shaped locking groove and a locking shaft fixed on the side of the battery pack. After the locking shaft moves vertically along the L-shaped locking groove and reaches the position, it further moves horizontally until the battery pack is locked successfully, that is, the battery pack is locked by moving horizontally after vertical movement. When the battery pack rises to the in-place position, the liquid cooling pipeline of the battery pack and the liquid supply device of the electric vehicle are hermetically connected through a liquid cooling connection device that is convenient for locking. Therefore, when the battery pack moves during the locking process, the connecting valve 2 that seals and connects the liquid cooling pipeline of the battery pack and the liquid supply device of the electric vehicle follows the movement of the battery pack through the moving component 11, and then keeps the relative position with the battery pack unchanged, ensuring the accuracy, tightness and connectivity of the liquid cooling connection. At the same time, the problem of unstable connection of the connecting valve 2 caused by the movement of the battery pack during the locking process is solved by the follow-up movement of the connecting valve 2, greatly improving the safety and stability of the liquid cooling connection device that is convenient for locking.

[0097] The mounting base 1 includes a moving plate 12, and the moving component 11 is arranged on the moving plate 12 to realize the moving connection of the connecting valve 2 relative to the moving plate 12. Through the moving component 11, the connecting valve 2 has a certain amount of movement relative to the moving plate 12, further increasing the movement amount 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 safety and stability of the liquid cooling connection device that is convenient for locking. At the same time, through the moving component 11, the connecting valve 2 moves along a predetermined direction on the moving plate 12, ensuring the accuracy of the connection and improving the connection efficiency.

[0098] The mounting base 1 further includes a fixing plate 13 for fixing the connecting valve 2. The moving component 11 includes a slider 112 and a guide rail 111 arranged between the fixing plate 13 and the moving plate 12. The connecting valve 2 is installed and fixed on the fixing plate 13, and then the slider 112 and the guide rail 111 are respectively connected to the fixing plate 13 and the moving plate 12 to realize the movement of the fixing plate 13 on the moving plate 12. The structure is simple, the installation is convenient, and the cost is low. At the same time, the slider 112 moves along a predetermined direction on the guide rail 111, effectively avoiding the phenomenon of offset and dislocation of the fixing plate 13 and the connecting valve 2 during the movement, ensuring the accuracy, tightness and connectivity of the liquid cooling connection.

[0099] The connecting valve 2 is arranged in the middle area of the fixing plate 13. The moving part 11 includes two sliders 112 arranged on the fixing plate 13 on both sides of the connecting valve 2 respectively and two guide rails 111 arranged at corresponding positions on the moving plate 12. By arranging the connecting valve 2 in the middle area of the fixing plate 13 and making the two sliders 112 on both sides of the connecting valve 2 move on the two guide rails 111, the force distribution on the fixing plate 13 is symmetric, ensuring the consistency of the moving process, preventing tilting, making the fixing plate 13 and the connecting valve 2 move more smoothly during the movement, and ensuring the accuracy, sealing performance and connectivity of the liquid cooling connection.

[0100] The mounting seat 1 is provided with a positioning part 14, and the connecting valve 2 and the battery pack or the bottom of the electric vehicle are positioned through the positioning part 14. When the connecting valve 2 is connected to the liquid supply device or the liquid cooling pipeline, it is positioned through the positioning part 14 to ensure the accuracy of the connection and improve the connection efficiency. Specifically, the specific structural form of the positioning part 14 can be two positioning holes respectively arranged on both sides of the connecting valve 2, and the specific structural form of the positioning part 14 can also be two positioning columns respectively arranged on both sides of the connecting valve 2; other positioning structures can also be adopted as long as the positioning requirements are met.

[0101] The mounting seat 1 further includes a fixed seat 15 forming a cavity 151, and the moving plate 12 is floatingly arranged in the cavity 151. During the installation of the battery pack, the positioning part 14 is positioned through the floating action of the moving plate 12. The connecting valve 2 is fixedly arranged on the fixing plate 13. By moving the moving plate 12 in the cavity 151, the fixing plate 13 and the connecting valve 2 will also move together, ensuring that the positioning part 14 on the mounting seat 1 can be quickly and accurately positioned during the installation of the battery pack, improving the connection efficiency of the connecting valve 2; at the same time, it can further increase the moving amount 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 connection device that is convenient for locking.

[0102] The mounting seat 1 further includes a plurality of elastic members 16, and the plurality of elastic members 16 are respectively connected from the corner positions of the moving plate 12 to the corner positions of the corresponding fixed seat 15. By connecting the plurality of elastic members 16 to the corner positions of the moving plate 12 respectively, the moving plate 12 can move in the fixed seat 15. At the same time, the plurality of elastic members 16 will act on the four sides of the moving plate 12 respectively, ensuring the movement and rebound of the moving plate 12 and improving the stability of the liquid cooling connection device that is convenient for locking. Among them, the elastic member 16 is a tension spring. It has high stability, simple structure and low cost.

[0103] The fixed seat 15 further includes a cover plate 152 disposed on the opening side of the cavity 151 and penetrated by the connecting valve 2, and a sealing sleeve 153 sealed between the cover plate 152 and the pipe wall of the connecting valve 2. The sealing sleeve 153 has a preset expansion space. The sealing sleeve 153 plays a sealing role. By the sealing sleeve 153, the opening between the cover plate 152 and the pipe wall of the connecting valve 2 is sealed, effectively preventing external dust, moisture, impurities, etc. from entering the cavity 151, and greatly improving the installation stability of the liquid-cooling connection device that is easy to lock. At the same time, the sealing sleeve 153 has a preset expansion space, so that the sealing sleeve 153 can also expand and contract during the movement of the connecting valve 2, thus ensuring the sealing effect. Preferably, the sealing sleeve 153 has a corrugated portion. Through the corrugated portion, the sealing sleeve 153 is made elastic and capable of expanding and contracting, which is convenient for processing and manufacturing and has a low cost.

[0104] The mounting seat 1 further includes a mounting plate 17, a plurality of shaft rods 18, and a plurality of elastic members 19. The mounting plate 17 is disposed in the accommodation cavity at the bottom of the electric vehicle or on the battery pack. The plurality of shaft rods 18 correspond to the plurality of elastic members 19 one by one. One end of each of the plurality of shaft rods 18 is fixed to the mounting plate 17 or the fixed seat 15, and the other end penetrates the fixed seat 15 or the mounting plate 17. The elastic members 19 are sleeved on the shaft rods 18 and are clamped between the mounting plate 17 and the fixed seat 15 in a compressed state.

[0105] Through the plurality of shaft rods 18, the fixed seat 15 can expand and contract relative to the mounting plate 17, which will drive the connecting valve 2 to expand and contract together, thereby further increasing the movement amount 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 that is easy to lock, and solving the problems such as unstable connection of the connecting valve caused by the movement of the battery pack during the locking process by the follow-up manner of the connecting valve 2. At the same time, each of the plurality of shaft rods 18 has a guiding function. Through the shaft rod 13, the fixed seat 15 moves along a preset path to achieve the precise connection of the connecting valve 2, and effectively avoids the offset and dislocation phenomenon of the fixed seat 15 during the movement, greatly improving the safety and stability of the liquid-cooling connection device that is easy to lock. Preferably, the fixed seat 15 can expand and contract relative to the mounting plate 17 along the flow direction of the flow passage.

[0106] The two ends of the elastic member 19 in the compressed state respectively exert a pushing force towards the mounting plate 17 and the fixed seat 15. When the fixed seat 15 generates a displacement, the telescopic movement of the fixed seat 15 relative to the mounting plate 17 is realized by compressing the elastic member 19, and the moving mechanism 12 can be restored under the action of the elastic member 19. At the same time, by arranging the plurality of elastic members 19 between the mounting plate 17 and the fixed seat 15, the fixed seat 15 can quickly and stably return to the non-initial state, improving the safety and stability of the liquid-cooling connection device that is easy to lock.

[0107] This embodiment also discloses a battery pack, which includes the above-mentioned liquid cooling connection device that is convenient for locking. By means of the moving part 11, the connection valve 2 of the liquid cooling pipeline that seals and communicates the battery pack with the liquid supply device of the electric vehicle follows the movement of the battery pack, and then keeps the relative position with the battery pack unchanged. By the way of the connection valve 2 following, the problems such as unstable connection of the connection valve 2 caused by the movement of the battery pack during the locking process are solved, and the safety and stability of the battery pack are greatly improved. At the same time, through the moving part 11, the connection valve 2 moves along a predetermined direction on the moving plate 12, ensuring the accuracy of the connection and improving the connection efficiency.

[0108] This embodiment also discloses an electric vehicle, which includes the above-mentioned liquid cooling connection device that is convenient for locking. By means of the moving part 11, the connection valve 2 of the liquid cooling pipeline that seals and communicates the battery pack with the liquid supply device of the electric vehicle follows the movement of the battery pack, and then keeps the relative position with the battery pack unchanged. By the way of the connection valve 2 following, the problems such as unstable connection of the connection valve 2 caused by the movement of the battery pack during the locking process are solved, and the safety and stability of the electric vehicle are greatly improved. At the same time, through the moving part 11, the connection valve 2 moves along a predetermined direction on the moving plate 12, ensuring the accuracy of the connection and improving the connection efficiency.

[0109] Although the specific implementation manners of the present invention have been described above, those skilled in the art should understand that this is only for illustration. The protection scope of the present invention is defined by the appended claims. Without departing from the principles and essence of the present invention, those skilled in the art can make various changes or modifications to these implementation manners, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A liquid cooling connection device facilitating locking, which is used to realize the connection between a coolant supply device provided on an electric vehicle and a liquid cooling pipeline in a battery pack, so as to introduce the coolant into the liquid cooling pipeline in the battery pack. It is characterized in that, Comprising: A mounting seat, which is arranged in a receiving cavity at the bottom of an electric vehicle or on a battery pack; And A connecting valve, which 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 be connected to the liquid cooling pipeline. A switchable 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 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 on the electric vehicle in a bottom-up direction; A moving component is arranged on the mounting seat, and the moving component is used to drive the whole mounting seat to move. When the locking shaft of the battery pack horizontally moves along the L-shaped locking groove at the bottom of the electric vehicle, the moving component drives the whole mounting seat and the connecting valve to move synchronously; Alternatively, a moving component is arranged on the mounting seat, the connecting valve is movably arranged on the moving component, and when the locking shaft of the battery pack horizontally moves along the L-shaped locking groove at the bottom of the electric vehicle, it drives the connecting valve to move in the opposite direction relative to the moving component; The mounting seat includes a moving plate, and the moving component is arranged on the moving plate to realize the movable connection of the connecting valve relative to the moving plate.

2. The liquid cooling connection device convenient for locking according to claim 1, characterized in that The mounting seat further includes a fixing plate for fixing the connecting valve, and the moving component includes a slider and a guide rail arranged between the fixing plate and the moving plate.

3. The liquid cooling connection device facilitating locking as described in claim 2, wherein, The connecting valve is arranged in the middle area of the fixing plate, and the moving component includes two sliders arranged on the fixing plate on both sides of the connecting valve respectively and two guide rails arranged at corresponding positions on the moving plate.

4. The liquid cooling connection device convenient for locking according to claim 1, characterized in that, A positioning component is arranged on the mounting seat, and the connecting valve and the battery pack or the bottom of the electric vehicle are positioned through the positioning component.

5. The liquid cooling connection device facilitating locking according to claim 4, wherein, The mounting seat further includes a fixing seat with a cavity formed therein, and the moving plate is floatingly arranged in the cavity. During the installation of the battery pack, the positioning component is positioned through the floating action of the moving plate.

6. The liquid cooling connection device facilitating locking as claimed in claim 5, wherein, The mounting seat further includes a plurality of elastic members, and the plurality of elastic members are respectively connected from the corner positions of the moving plate to the corresponding corner positions of the fixing seat.

7. The liquid cooling connection device convenient for locking according to claim 6, characterized in that, The elastic member is a tension spring.

8. The liquid cooling connection device convenient for locking according to claim 5, characterized in that, The fixing seat further includes a cover plate arranged on the opening side of the cavity and penetrated by the connecting valve, and a sealing sleeve sealed between the cover plate and the pipe wall of the connecting valve. The sealing sleeve has a preset expansion space.

9. The liquid cooling connection device facilitating locking according to claim 8, characterized in that, The sealing sleeve has a corrugated portion.

10. A battery pack, characterized in that, It includes a liquid cooling connection device for facilitating locking as described in any one of claims 1-9.

11. An electric vehicle, characterized in that, It includes a liquid cooling connection device for facilitating locking as described in any one of claims 1-9.

Images