Sealing device and energy storage equipment

Abstract

The embodiment of the invention provides a sealing device and energy storage equipment, and relates to the technical field of energy storage equipment, the energy storage equipment comprises a shell and a plurality of battery modules arranged in the shell, the shell is provided with at least one avoiding hole, the sealing device comprises an adapter plate, a connecting assembly and a wiring assembly, the wiring assembly is arranged on the adapter plate, and the connecting assembly is arranged on the adapter plate. The wiring assembly is used for being electrically connected with the battery module and further provided with an electric connecting part, and the electric connecting part is used for being electrically connected with a connecting wire through the avoiding hole; the connecting assembly is used for driving the adapter plate to be in contact with the inner wall of the shell so as to seal the avoiding hole, so that the adapter plate is always pressed on the inner wall of the shell, and when cooling liquid is directly introduced into the shell to cool the battery module, the cooling liquid can be prevented from leaking from the joint of the adapter plate and the shell; therefore, compared with independent cooling of the battery module, the cost can be effectively reduced, and the space utilization rate can be improved.

Description

A sealing device and energy storage equipment Technical Field

[0001] This application relates to the field of energy storage equipment technology, and in particular to a sealing device and an energy storage device. Background Technology

[0002] Energy storage devices generally include a housing and multiple battery modules installed inside the housing. The housing has multiple clearance holes corresponding to the battery modules. Adapters are installed in the clearance holes, which allow external connection of adapters and connecting cables to achieve connection between the battery modules.

[0003] To make efficient use of space, multiple battery modules are typically arranged densely within the casing, which places high demands on heat dissipation in energy storage devices. Immersion liquid cooling is a commonly used heat dissipation method for energy storage devices. This method involves circulating coolant into each battery module to dissipate heat, ensuring that the individual cells within the module are completely submerged in the coolant. This method offers high heat exchange efficiency and provides good protection for the battery modules.

[0004] However, this heat dissipation method results in a larger battery module size, and the increased sealing requirements also lead to higher production costs. Summary of the Invention

[0005] This application provides a sealing device and an energy storage device to solve the problem that introducing coolant into the battery module for heat dissipation results in a large battery module size and high production cost.

[0006] A first aspect of this application provides a sealing device for an energy storage device. The energy storage device includes a housing and a plurality of battery modules disposed within the housing. The housing has at least one clearance hole. The sealing device includes an adapter plate, a connecting assembly, and a wiring assembly. The wiring assembly is disposed on the adapter plate and is used for electrical connection with the battery modules. The wiring assembly also has an electrical connection portion for electrically connecting a connecting wire through the clearance hole.

[0007] The connecting assembly is used to drive the adapter plate to contact the inner wall of the housing to close the clearance hole.

[0008] In some possible designs, a sealing assembly is also included, which is disposed on the side of the adapter plate near the clearance hole and extends at least partially beyond the adapter plate. The sealing assembly surrounds the periphery of the wiring assembly and is configured to seal against the inner wall of the housing when the adapter plate closes the clearance hole.

[0009] In some possible designs, the sealing assembly includes a first sealing assembly and a second sealing assembly, the first sealing assembly surrounding the periphery of the second sealing assembly, and the second sealing assembly surrounding the periphery of the wiring assembly.

[0010] In some possible designs, the adapter plate is provided with a first annular groove and a second annular groove, the first sealing component is disposed in the first annular groove, and the second sealing component is disposed in the second annular groove.

[0011] In some possible designs, the connection assembly includes at least one elastic element and at least one guide element for connecting the battery module and the adapter plate. The elastic element is located between the adapter plate and the battery module and is configured to drive the adapter plate to move axially along the guide element so as to press the adapter plate against the housing.

[0012] In some possible designs, the guide is a pin, the elastic element is a spring sleeved on the pin, and the adapter plate is provided with a connecting hole for the pin to pass through.

[0013] In some possible designs, four guide members are provided, and the four guide members are evenly distributed around the periphery of the adapter plate.

[0014] In some possible designs, the connecting assembly further includes a snap-fit ​​connector, through which the guide and the adapter plate are connected. The adapter plate is configured to deflect relative to the guide under external force, and the snap-fit ​​connector is configured to drive the adapter plate to reset when the external force is removed.

[0015] In some possible designs, the snap-fit ​​element is a snap ring, which includes a main body and an engaging part. One end of the guide member is provided with a snap groove. The main body is connected to the connecting hole, and the engaging part engages with the snap groove. The length of the snap groove in the axial direction of the guide member is greater than the thickness of the engaging part.

[0016] In some possible designs, the guide includes an interconnected main body section and a threaded section, the main body section being for connection to the adapter plate, and the threaded section being located at the end of the main body section opposite to the adapter plate, the threaded section being for connection to the battery module.

[0017] In some possible designs, a positioning part is provided at the connection between the main body segment and the threaded segment, and the outer diameter of the positioning part is larger than the outer diameter of the threaded segment.

[0018] In some possible designs, an insulating pad is also included, which is laid on the side of the adapter plate opposite to the clearance hole.

[0019] A second aspect of this application provides an energy storage device, including a housing, at least one battery module, and at least one sealing device as described in any of the first aspects. The battery module and the sealing device are both located inside the housing. The housing has at least one clearance hole, and the sealing device is used to seal the clearance hole.

[0020] In some possible designs, the housing is provided with a first connecting portion and a second connecting portion, which are used to connect to a heat dissipation device that supplies coolant, so that the coolant enters the housing through the first connecting portion to dissipate heat from the battery module, and flows back to the heat dissipation device through the second connecting portion.

[0021] In some possible designs, the sealing device is configured in a one-to-one correspondence with the battery module.

[0022] In the sealing device and energy storage device provided in this application embodiment, the sealing device is provided with an adapter plate, a connecting component, and a wiring component. The wiring component has an electrical connection part, which is used to electrically connect external connecting wires through a clearance hole. At the same time, the wiring component is connected to the positive and negative terminals of the battery module. Thus, by adjusting the connecting wires connected to the electrical connection part, series or parallel connection between different battery modules can be achieved. The connecting component is used to drive the adapter plate to contact the inner wall of the housing to seal the clearance hole and prevent liquid leakage at the clearance hole. In use, since the electrical connection part is opposite to the clearance hole, the connecting wire can be connected or disconnected from the electrical connection part from the outside of the housing, which is more convenient to operate. The adapter plate also seals the clearance hole, which can prevent liquid leakage at the clearance hole. Therefore, coolant can be directly introduced into the housing, so that the battery module inside the housing is completely immersed in coolant for heat dissipation, without having to dissipate coolant through the inside of the battery module. This eliminates the need to add additional spacers and liquid inlet or outlet structures inside the battery module, which helps to reduce the size of the battery module and reduce the production cost of the energy storage device. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0024] Figure 1 is a schematic diagram of the connection structure between the sealing device and the battery module provided in an embodiment of this application;

[0025] Figure 2 is a schematic diagram of the energy storage device provided in an embodiment of this application;

[0026] Figure 3 is a schematic diagram of the outer casing of the energy storage device provided in the embodiment of this application;

[0027] Figure 4 is a perspective view of the sealing device provided in an embodiment of this application;

[0028] Figure 5 is a front view of the sealing device provided in an embodiment of this application;

[0029] Figure 6 is a top view of the sealing device provided in an embodiment of this application;

[0030] Figure 7 is a schematic diagram of the guide component in the sealing device provided in the embodiment of this application;

[0031] Figure 8 is a schematic diagram of the structure of the insulating pad in the sealing device provided in the embodiment of this application.

[0032] Figure label:

[0033] 100 - Housing; 110 - Clearance hole;

[0034] 200-Battery Module;

[0035] 310-Adapter plate; 311-Connecting hole; 312-Allowing groove; 313-First annular groove; 314-Second annular groove; 320-Connecting assembly; 321-Elastic element; 322-Guide element; 3221-Threaded section; 3222-Main body section; 3223-Positioning part; 3224-Slot; 323-Snap-fit ​​element; 330-Wiring assembly; 331-Electrical connection part; 340-Sealing assembly; 341-First sealing assembly; 342-Second sealing assembly; 350-Insulating pad; 351-Mounting hole; 400-Adapter wire; 500-Connecting wire.

[0036] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0037] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0038] In practical applications, adapters are installed on the outer casing of the energy storage device to accommodate each battery module by creating clearance holes. These adapters are used to connect the battery modules to each other.

[0039] Currently, adapters primarily rely on threaded fastenings to connect to the housing, with a sealing ring used to seal the gap between the adapter and the housing. While this design doesn't cause problems in the short term, prolonged use or long-distance transportation can lead to the threads gradually loosening due to bumps and other factors, creating a risk of leakage at the edges of the adapter and clearance holes. Therefore, when using immersion liquid cooling, coolant is typically channeled into each battery module for heat dissipation.

[0040] In the prior art, a heat dissipation structure for an energy storage device is disclosed. This structure includes components such as a separator and a shunt structure within the battery module housing. Each battery module has an inlet and an outlet pipe, through which coolant circulates within the separator to dissipate heat. However, in actual production, to prevent coolant leakage, each battery module requires sealing and safety testing. This not only increases production costs due to the additional components but also incurs additional testing fees, resulting in higher production costs for the battery modules and consequently, higher production costs for the energy storage device. Furthermore, the additional separators, shunt structures, inlet and outlet pipes required for coolant dissipation also increase the size of the battery modules, enlarging the space they occupy within the energy storage device and thus increasing the overall size of the device.

[0041] To avoid the aforementioned problems, this application provides a sealing device and an energy storage device that can adjust the position of the adapter plate through the connecting component so that the adapter plate always seals the clearance hole, preventing leakage at the clearance hole. Therefore, when heat dissipation is carried out by immersion liquid cooling, the coolant can be directly passed through the housing without having to separately pass the coolant into each battery module, which helps to reduce the size of the energy storage device and lower the production cost of the energy storage device.

[0042] It is understood that the battery module in the embodiments of this application can be a common battery such as a lithium-ion battery, a lead-acid battery, a sodium-sulfur battery, or a flow battery, as long as it can store and release electrical energy. The embodiments of this application do not limit it.

[0043] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0044] Please refer to Figures 1, 2, and 3. In some embodiments, the energy storage device includes a housing 100 and multiple battery modules 200. The battery modules 200 can be stacked inside the housing 100 according to a certain pattern using a bracket. The housing 100 is provided with clearance holes 110, and a sealing device is provided at the clearance holes 110 to seal the clearance holes 110. The sealing device is connected to the positive and negative terminals of each battery module 200 respectively. The battery modules 200 can be connected in series or parallel through the clearance holes 110 using connecting wires 500 to realize the input or output of current from the battery modules 200.

[0045] The clearance hole 110 and the sealing device are configured in a one-to-one correspondence. One sealing device can be connected to one battery module 200 or multiple battery modules 200 at the same time. The specific configuration can be determined according to the actual situation. This embodiment does not limit this configuration.

[0046] Of course, in some cases, only one battery module 200 may be provided. When only one battery module 200 is provided, the adapter is only used to connect the battery module 200 to an external device. This embodiment does not limit this.

[0047] It is understood that energy storage devices also include inverters, control systems, safety systems, and other structures, which are well known to those skilled in the art and will not be described in detail in this embodiment.

[0048] In some embodiments, the housing 100 is further provided with a first connecting portion and a second connecting portion, which are used to connect to a heat dissipation device that supplies coolant, so that coolant enters the housing 100 through the first connecting portion, allowing the battery module 200 to be immersed in the coolant for heat dissipation, while the coolant after heat exchange with the battery module 200 flows back to the heat dissipation device through the second connecting portion for circulation.

[0049] The heat dissipation device here can be an external device that can cool the coolant, or it can be the cooling system of the energy storage device itself. This embodiment does not limit it.

[0050] To prevent leakage due to loosening of the connection between the sealing device and the housing 100 during the use of the energy storage device, please refer to Figures 1 and 4. In some embodiments, the sealing device includes an adapter plate 310, a connection assembly 320, and a wiring assembly 330.

[0051] The wiring assembly 330 is disposed on the adapter plate 310. The wiring assembly 330 is used to electrically connect with the battery module 200. The wiring assembly 330 also has an electrical connection part 331, which is used to electrically connect the connecting wire 500 through the clearance hole 110. The connecting assembly 320 is used to drive the adapter plate 310 to contact the inner wall of the housing 100 to close the clearance hole 110. That is, the connecting assembly 320 can provide driving force to the adapter plate 310 so that the adapter plate 310 is always kept in close contact with the inner wall of the housing 100, thereby always closing the clearance hole 110.

[0052] Specifically, the wiring assembly 330 can be fixed to the adapter plate 310 by welding or other means. In addition to the electrical connection part 331, the wiring assembly 330 may also include another connection part, which can be a connecting piece or plug, etc. This connection part can be connected to the adapter cable 400. Each battery module 200 includes at least two terminals: a positive terminal and a negative terminal. Therefore, at least two connection parts are provided for each battery module 200. These connection parts connect to the positive or negative terminal of the battery module 200 via the adapter cable 400. Each connection part corresponds to an electrical connection part 331, which is electrically connected to the connection part. The electrical connection part 331 can be a common adapter for plugging in wires. By plugging the connecting wire 500 into the corresponding electrical connection part 331, the connecting wire 500 can be connected to the positive or negative terminal of the battery module 200 via the adapter cable 400, thereby enabling the current input and output of the battery module 200.

[0053] In addition, in the energy storage device, each battery module 200 can be equipped with a corresponding sealing device, and each sealing device can also be equipped with a corresponding clearance hole 110. That is, each sealing device has two connecting parts and an electrical connecting part 331, corresponding to the positive and negative terminals of the battery module 200, respectively. Markings can be set on the adapter plate 310 to indicate which electrical connecting part 331 corresponds to the positive terminal and which corresponds to the negative terminal, so that operators can connect the corresponding connecting wires 500. This arrangement allows for segmented sealing of the battery module 200 through the sealing device. Compared to independent heat dissipation for a single battery module 200, this effectively improves the volume utilization rate of the energy storage device and reduces inspection and production costs.

[0054] Of course, a sealing device can also be set for multiple battery modules 200. In this case, an electrical connection part 331 corresponding to the number of connectors of the battery modules 200 that need to be connected can be set on the adapter plate 310.

[0055] During the use of the energy storage device, since the connecting component 320 can drive the adapter plate 310 to always press against the inner wall of the housing 100, even with long-term use or transportation bumps, the sealing effect of the adapter plate 310 on the clearance hole 110 can be guaranteed, thus preventing coolant from leaking out from the clearance hole 110. If it is necessary to dissipate heat from the battery module 200, coolant can be directly introduced into the housing 100, so that all battery modules 200 inside the housing 100 can be immersed in coolant. Compared with independent heat dissipation of the battery module 200, the sealing device in this embodiment can effectively dissipate heat from the battery module 200 without increasing the volume of the battery module 200.

[0056] In some embodiments, as shown in Figures 4 and 5, the sealing device further includes a sealing assembly 340, which is disposed on the side of the adapter plate 310 near the clearance hole 110 and extends at least partially outside the adapter plate 310. The sealing assembly 340 surrounds the periphery of the wiring assembly 330, that is, the area of ​​the adapter plate 310 is larger than the area of ​​the clearance hole 110, the wiring assembly 330 is within the coverage area of ​​the clearance hole 110, and the sealing assembly 340 is surrounding the outside of the clearance hole 110.

[0057] The sealing component 340 is made of a deformable sealing material with certain corrosion resistance, such as rubber. When the adapter plate 310 closes the clearance hole 110, the inner walls of the adapter plate 310 and the outer shell 100 will squeeze the sealing component 340, causing the sealing component 340 to deform and block the gap between the adapter plate 310 and the outer shell 100, thereby improving the sealing effect of the adapter plate 310 on the clearance hole 110 and preventing leakage.

[0058] To further improve the sealing effect, the sealing assembly 340 includes a first sealing assembly 341 and a second sealing assembly 342. The first sealing assembly 341 surrounds the periphery of the second sealing assembly 342, and the second sealing assembly 342 surrounds the periphery of the wiring assembly 330.

[0059] Specifically, the first sealing component 341 is arranged around the second sealing component 342. During use, the coolant first comes into contact with the edge of the first sealing component 341, which can play a first-level anti-leakage role. The second sealing component 342 can also play a second-level anti-leakage role, thus providing double protection for the sealing between the adapter plate 310 and the outer shell 100, thereby improving the safety of the energy storage device.

[0060] In some embodiments, the first sealing assembly 341 and the second sealing assembly 342 each include at least two sealing strips, one of which is fitted over the other, thereby further improving the sealing effect and reducing the probability of leakage.

[0061] In some embodiments, the adapter plate 310 is provided with a first annular groove 313 and a second annular groove 314, a first sealing component 341 is disposed in the first annular groove 313, and a second sealing component 342 is disposed in the second annular groove 314.

[0062] It is understandable that the first annular groove 313 and the second annular groove 314 here simply refer to the grooves being connected end to end. The annular groove can be any shape, such as circular, elliptical or square, as long as it allows the first annular sealing component 341 and the second sealing component 342 to be inserted and limited by it.

[0063] Of course, the first sealing component 341 and the second sealing component 342 can be correspondingly engaged within the first annular groove 313 and the second annular groove 314, that is, directly and tightly fitted with the first annular groove 313 and the second annular groove 314. Alternatively, the width of the first sealing component 341 and the second sealing component 342 can be smaller than the width of the first annular groove 313 and the second annular groove 314, and they can simply be placed within the first annular groove 313 and the second annular groove 314.

[0064] In some embodiments, an annular groove is provided on the housing 100 for insertion of the first sealing component 341 and the second sealing component 342, and the first sealing component 341 and the second sealing component 342 are not fixed on the adapter plate 310.

[0065] In some embodiments, as shown in Figures 4, 6, and 7, the connecting assembly 320 includes at least one elastic element 321. The elastic element 321 is located between the adapter plate 310 and the battery module 200. The elastic element 321 can be connected to the adapter plate 310 and the battery module 200 at both ends. The battery module 200 serves as the positioning point of the elastic element 321. The elastic element 321 continuously provides a certain compressive force to the adapter plate 310, so that the adapter plate 310 is always pressed against the housing 100, effectively sealing the clearance hole 110 and preventing leakage.

[0066] Understandably, the elastic element 321 can be a deformable element such as a spring or sheet that can store potential energy when compressed, and it can always maintain the tendency to return to its original shape, thereby continuously providing the adapter plate 310 with the driving force to move toward the outer shell 100.

[0067] Meanwhile, in order to restrict the movement direction of the adapter plate 310, the connecting assembly 320 also includes at least one guide 322. The guide 322 is used to connect the battery module 200 and the adapter plate 310. The extension direction of the guide 322 is preferably perpendicular to the surface of the housing 100 that contacts the adapter plate 310. Of course, the surface of the adapter plate 310 that contacts the housing 100 is also preferably consistent with the shape of the inner wall surface of the housing 100 at that location, so as to better fit and seal with the housing 100.

[0068] During use, the elastic element 321 is always in a compressed state and stores elastic potential energy, so that it can always press against the side of the adapter plate 310 away from the outer shell 100, so that the adapter plate 310 moves along the axial direction of the guide element 322 and presses against the inner wall surface of the outer shell 100.

[0069] It is understood that the guide 322 may not be connected to the battery module 200, but a corresponding mounting part may be added to the housing 100 to support the guide 322. This embodiment does not limit this.

[0070] In some embodiments, the guide member 322 is a pin, and the adapter plate 310 is provided with a connecting hole 311 for the pin to pass through. After the pin is inserted into the connecting hole 311, the pin is slidably connected to the connecting hole 311, so that the adapter plate 310 can move along the pin. The elastic member 321 is a spring, which is sleeved outside the pin. At this time, a limiting plate can be provided at the end of the pin near the battery module 200, so that the spring is limited between the limiting plate and the adapter plate 310. That is, the spring drives the adapter plate 310 to move with the limiting plate as the positioning point, without having to contact the battery module 200.

[0071] When the guide 322 is a pin, in order to facilitate the installation of the guide 322, the guide 322 can include a main body section 3222 and a threaded section 3221 connected to each other. The main body section 3222 is used to connect with the adapter plate 310. It can be a column without threads. A spring is sleeved on the outside of the main body section 3222. The threaded section 3221 is located at the end of the main body section 3222 away from the adapter plate 310. The threaded section 3221 is used to connect with the battery module 200. That is, a threaded hole can be opened on the housing of the battery module 200. The threaded section 3221 is threadedly connected to the threaded hole on the housing, which can prevent the guide 322 from separating from the battery module 200.

[0072] It is understandable that the spring may not be sleeved on the outside of the pin, but can be directly connected to the adapter plate 310 at one end and the battery module 200 at the other end. This embodiment does not limit this.

[0073] Alternatively, the guide 322 can be a slide rail instead of a pin, and a slider that moves along the slide rail can be correspondingly provided on the adapter plate 310. Of course, the guide 322 can also be other structures, as long as it can restrict the movement direction of the adapter plate 310. This embodiment does not limit it.

[0074] In order to control the depth to which the guide 322 is screwed into the battery module 200, a positioning part 3223 is provided at the connection between the main body section 3222 and the threaded section 3221. The outer diameter of the positioning part 3223 is larger than the outer diameter of the threaded section 3221. When the threaded section 3221 is screwed into the battery module 200, it can only be screwed up to the positioning part 3223 at most, and then the guide 322 cannot be screwed further into the battery module 200. This avoids the guide 322 from affecting the components inside the battery module 200 due to the excessive distance it is screwed into the battery module 200.

[0075] Alternatively, the diameter of the main body section 3222 can be made larger than the diameter of the threaded section 3221, and the positioning part 3223 can be formed directly at the end of the main body section 3222 without any additional setup.

[0076] It is understandable that when an additional protrusion is provided as a positioning part 3223, the positioning part 3223 can also be used directly as a limit plate, reducing the number of parts required.

[0077] In some embodiments, in order to enable the adapter plate 310 to effectively contact the housing 100, four guide members 322 may be provided, and the four guide members 322 may be evenly arranged around the adapter plate 310.

[0078] For example, a circle is drawn with the midpoint of the adapter plate 310 as the center, and four guide members 322 are evenly distributed on the circumference of the circle, thereby driving the adapter plate 310 from multiple directions.

[0079] For example, as shown in FIG5, the adapter plate 310 is square, and four guide members 322 are respectively disposed at the four corners of the adapter plate 310, and the movement direction of the adapter plate 310 is guided by the four guide members 322.

[0080] In some embodiments, the connecting assembly 320 further includes a snap-fit ​​member 323, the guide member 322 and the adapter plate 310 are connected by the snap-fit ​​member 323, the adapter plate 310 is configured to deflect relative to the guide member 322 under the action of an external force, and the snap-fit ​​member 323 is configured to drive the adapter plate 310 to reset when the external force disappears.

[0081] Specifically, the snap-fit ​​component 323 is a snap ring, which includes a main body and a snap-fit ​​part. One end of the guide component 322 is provided with a snap groove 3224. The main body is connected to the connecting hole 311, and the snap-fit ​​part snaps into the snap groove 3224. The length of the snap groove 3224 in the axial direction of the guide component 322 is greater than the thickness of the snap-fit ​​part.

[0082] After the engaging part is inserted into the slot 3224, the offset distance of the adapter plate 310 relative to the guide member 322 in the XY plane can be limited. At the same time, the maximum axial movement distance of the adapter plate 310 relative to the pin can also be limited, so as to prevent the guide member 322 from separating from the adapter plate 310.

[0083] For example, the retaining ring can be a C-shaped retaining ring, the outer edge of its main body can be connected to the edge of the connecting hole 311, while the multiple engaging parts on the inner side are used to insert into the retaining groove 3224 to restrict the position of the adapter plate 310.

[0084] The diameter of the connecting hole 311 is slightly larger than the outer diameter of the pin, allowing the adapter plate 310 to move smoothly along the pin. This also allows the adapter plate 310 to deflect relative to the pin under external force. With the snap ring installed, due to its elastic deformation capability, when an external force pushes the adapter plate 310 to deflect in the XY plane, it will cause the snap ring to deform. After the external force disappears, the snap ring will return to its original shape, thereby driving the adapter plate 310 back to its original position.

[0085] During the use of the adapter plate 310, the snap ring enables the adapter plate 310 to have a certain degree of floating in the XY plane, and the spring enables the adapter plate 310 to have a certain degree of floating in the Z direction. The combination of the two can realize the 360° displacement of the adapter plate 310, that is, the adapter plate 310 has high floating ability and can be adjusted in position according to the actual situation by the snap ring and the spring to ensure the sealing effect.

[0086] It is understood that the snap-fit ​​component 323 can also be other structures with elastic deformation capability, as long as it can deform when the adapter plate 310 is deflected and restore the adapter plate 310 to its original position by restoring the deformation. This embodiment does not limit it.

[0087] In some embodiments, as shown in FIG8, the sealing device further includes an insulating pad 350, which is laid on the side of the adapter plate 310 opposite to the clearance hole 110.

[0088] Specifically, the insulating pad 350 can be attached to the surface of the adapter plate 310 by means of adhesive or other methods. Mounting holes 351 can be made on the insulating pad 350 at positions corresponding to the connecting component 320, allowing the adapter cable 400 to pass through the mounting holes 351 and connect to the connecting component 320. Adding the insulating pad 350 provides insulation between the adapter cable 400 and the front end, preventing interference and improving stability.

[0089] In some embodiments, as shown in FIG4, clearance grooves 312 can be provided on both sides of the adapter plate 310 to avoid some components on the battery module 200, thereby facilitating operation.

[0090] Finally, it should be noted that other embodiments of this application will readily conceive of by those skilled in the art upon consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of this application that follow the general principles of this application and include common knowledge or customary techniques in the art not disclosed herein, and is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and alterations may be made without departing from its scope. The scope of this application is limited only by the appended claims.

Claims

1. A sealing device for an energy storage device, the energy storage device comprising a housing (100) and a plurality of battery modules (200) disposed within the housing (100), the housing (100) having at least one clearance hole (110), characterized in that, The sealing device includes an adapter plate (310), a connecting assembly (320), and a wiring assembly (330). The wiring assembly (330) is disposed on the adapter plate (310) and is used to electrically connect to the battery module (200). The wiring assembly (330) also has an electrical connection part (331) for electrically connecting a connecting wire (500) through the clearance hole (110). The connecting assembly (320) is used to drive the adapter plate (310) to contact the inner wall of the housing (100) to close the clearance hole (110).

2. The sealing device according to claim 1, characterized in that, It also includes a sealing assembly (340) disposed on the side of the adapter plate (310) near the clearance hole (110) and extending at least partially outside the adapter plate (310). The sealing assembly (340) surrounds the periphery of the wiring assembly (330) and is configured to seal against the inner wall of the housing (100) when the adapter plate (310) closes the clearance hole (110).

3. The sealing device according to claim 2, characterized in that, The sealing assembly (340) includes a first sealing assembly (341) and a second sealing assembly (342), wherein the first sealing assembly (341) surrounds the periphery of the second sealing assembly (342), and the second sealing assembly (342) surrounds the periphery of the wiring assembly (330).

4. The sealing device according to claim 3, characterized in that, The adapter plate (310) is provided with a first annular groove (313) and a second annular groove (314), the first sealing component (341) is disposed in the first annular groove (313), and the second sealing component (342) is disposed in the second annular groove (314).

5. The sealing device according to any one of claims 1-4, characterized in that, The connecting assembly (320) includes at least one elastic element (321) and at least one guide element (322), the guide element (322) for connecting the battery module (200) and the adapter plate (310), the elastic element (321) being located between the adapter plate (310) and the battery module (200), the elastic element (321) being configured to drive the adapter plate (310) to move axially along the guide element (322) so that the adapter plate (310) presses against the housing (100).

6. The sealing device according to claim 5, characterized in that, The guide member (322) is a pin, the elastic member (321) is a spring sleeved on the pin, and the adapter plate (310) is provided with a connecting hole (311) for the pin to pass through.

7. The sealing device according to claim 5, characterized in that, Four guide members (322) are provided, and the four guide members (322) are evenly arranged on the periphery of the adapter plate (310).

8. The sealing device according to claim 6, characterized in that, The connecting assembly (320) further includes a snap-fit ​​member (323), through which the guide member (322) and the adapter plate (310) are connected. The adapter plate (310) is configured to deflect relative to the guide member (322) under the action of an external force. The snap-fit ​​member (323) is configured to drive the adapter plate (310) to reset when the external force disappears.

9. The sealing device according to claim 8, characterized in that, The snap-fit ​​component (323) is a snap ring, which includes a main body and a snap-fit ​​part. One end of the guide (322) is provided with a snap groove (3224). The main body is connected to the connecting hole (311). The snap-fit ​​part snaps into the snap groove (3224). The length of the snap groove (3224) in the axial direction of the guide (322) is greater than the thickness of the snap-fit ​​part.

10. The sealing device according to claim 6, characterized in that, The guide member (322) includes a main body section (3222) and a threaded section (3221) connected to each other. The main body section (3222) is used to connect with the adapter plate (310). The threaded section (3221) is located at the end of the main body section (3222) opposite to the adapter plate (310). The threaded section (3221) is used to connect with the battery module (200).

11. The sealing device according to claim 10, characterized in that, A positioning part (3223) is provided at the connection between the main body section (3222) and the threaded section (3221), and the outer diameter of the positioning part (3223) is larger than the outer diameter of the threaded section (3221).

12. The sealing device according to any one of claims 1-4, characterized in that, It also includes an insulating pad (350) which is laid on the side of the adapter plate (310) away from the clearance hole (110).

13. An energy storage device, characterized in that, The device includes a housing (100), at least one battery module (200), and at least one sealing device as described in any one of claims 1-12, wherein the battery module (200) and the sealing device are both located inside the housing (100), and the housing (100) is provided with at least one clearance hole (110), and the sealing device is used to seal the clearance hole (110).

14. The energy storage device according to claim 13, characterized in that, The outer casing (100) is provided with a first connecting part and a second connecting part. The first connecting part and the second connecting part are used to connect to a heat dissipation device that supplies coolant, so that the coolant enters the outer casing (100) through the first connecting part to dissipate heat from the battery module (200), and flows back to the heat dissipation device through the second connecting part.

15. The energy storage device according to claim 13 or 14, characterized in that, The sealing device is provided in a one-to-one correspondence with the battery module (200).

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