Power storage device and power consuming device

Abstract

The application provides a power storage device and a power consumption device. The power storage device comprises a connector, a BMS plate, a cover, a plurality of fixing members and a shell. The connector comprises a seat and a communication terminal and an electrical connection terminal arranged on the seat. The seat is fixed and electrically connected with the BMS plate. The cover is provided with a through hole, the communication terminal and the electrical connection terminal pass through the through hole and extend to one side of the outer surface of the cover. A first sealing member is arranged between the inner surface of the cover and the seat and surrounds the through hole. Each fixing member is fixedly connected with the cover and the seat. The cover is covered on the opening of the shell, the opening is provided with a second sealing member, the second sealing member is sealingly connected with the cover and the shell, the Shore hardness of the second sealing member is A, and HD 65≤A. The BMS plate is located in the accommodating cavity formed by the inner surface of the cover and the inner surface of the shell. In this way, the stable connection of the BMS plate is ensured, the connection between the cover and the shell guarantees the connection strength and has a certain flexibility, and the mutual pulling of the rigid parts is avoided.

Description

Technical Field

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

[0002] A power storage device used in electrical equipment such as drones, electric vehicles, and power tools, which connects to the outside via a connector. Connectors typically include electrical connection terminals and signal connection terminals.

[0003] For integrated design, the electrical connection terminals and signal connection terminals will be designed as a single connector.

[0004] In related technologies, the connection between the connector and the electrical connection structure of the electrical equipment is a rigid connection. When subjected to impacts such as external drops, the connector and the electrical connection structure are easily pulled together, resulting in stress concentration damage, which in turn affects the service life of the connector and the energy storage device. Utility Model Content

[0005] In view of this, embodiments of this application provide an energy storage device and an electrical device, aiming to solve the problem that the connection between the connector of the energy storage device and the electrical connection structure of the electrical device is a rigid connection, which is easily damaged by stress concentration when subjected to external impacts such as drops, causing the connector and the electrical connection structure to pull against each other, thereby affecting the service life of the connector and the energy storage device.

[0006] In a first aspect, embodiments of this application provide an energy storage device, comprising a connector, a BMS board, a cover, multiple fasteners, and a housing. The connector includes a base and communication terminals and electrical connection terminals disposed on the base. The base is fixed to and electrically connected to the BMS board. The cover has a through-hole through which the communication terminals and electrical connection terminals pass and extend to one side of the outer surface of the cover. A first sealing element is disposed between the inner surface of the cover and the base, surrounding the through-hole. Each of the multiple fasteners is fixedly connected to the cover and the base. The cover closes onto an opening in the housing, where a second sealing element is provided, sealingly connecting the cover and the housing. The hardness of the second sealing element is A, where HD 65 ≤ A. The BMS board is located within a receiving cavity formed by the inner surface of the cover and the inner surface of the housing.

[0007] In conjunction with the first aspect described above, in one possible implementation, the energy storage device further includes a tab support and a battery module disposed within a receiving cavity, the battery module being electrically connected to the BMS via the tab support; along the height direction of the energy storage device, the BMS board, the tab support, and the battery module are arranged sequentially, the BMS board being connected to the tab support via multiple first flexible connectors; the cover and the housing are connected to a second seal via multiple second flexible connectors; preferably, the first flexible connectors include first plastic rivets and / or first thermoplastic rivets, and / or, the second flexible connectors include second plastic rivets and / or second thermoplastic rivets.

[0008] In conjunction with the first aspect described above, in one possible implementation, the energy storage device further includes a bus and an adapter. The bus is mounted on a tab support. A first end of the bus is electrically connected to the battery module, and a second end of the bus is electrically connected to the BMS board. A buffer plate is provided between the first and second ends. The adapter includes a main board and multiple connection pins connected to the periphery of the main board. The multiple connection pins are electrically connected to the BMS board, and the main board is electrically connected to the second end.

[0009] In conjunction with the first aspect above, in one possible implementation, the buffer plate is arranged in a zigzag pattern with the first end and the second end; the plurality of connection pins include at least four connection pins, which are spaced apart along the periphery of the motherboard; preferably, the motherboard is a rectangular plate.

[0010] In conjunction with the first aspect described above, in one possible implementation, the connector is fixedly connected to a first corner region of the BMS board, and each first flexible connector is evenly distributed on at least one second corner region of the BMS board away from the connector. The first corner region of the BMS board has a bending angle, and the cover and / or housing are provided with snap-fit ​​angles corresponding to the positions of the first corner regions, with the bending angle and snap-fit ​​angle being provided in a corresponding manner.

[0011] In conjunction with the first aspect above, in one possible implementation, the Shore hardness of the second seal is A, where A satisfies: HD 70 ≤ A ≤ HD 90.

[0012] In conjunction with the first aspect described above, in one possible implementation, the energy storage device further includes multiple pouch cells, which are stacked to form a battery module. The multiple pouch cells are electrically connected to a BMS board and disposed within a receiving cavity, with an adhesive layer provided between the multiple pouch cells and the receiving cavity.

[0013] In conjunction with the first aspect described above, in one possible implementation, the energy storage device further includes a plurality of prismatic battery cells electrically connected to a BMS board. The plurality of prismatic battery cells are disposed within a receiving cavity and form a battery module. End plates are respectively provided on both sides of the battery module along the width direction of the energy storage device, and the end plates are received within the receiving cavity and snapped into the battery module.

[0014] In conjunction with the first aspect above, in one possible implementation, the thickness of the end plate gradually decreases along the direction from the opening towards the inner bottom surface of the housing, and the sides of the end plate are respectively attached to the outer surface of the battery module and the inner surface of the housing; and / or, the bottom of the battery module is bonded to the inner bottom surface of the housing.

[0015] Secondly, embodiments of this application also provide an electrical device, including the aforementioned energy storage device.

[0016] The connector in this application integrates multiple terminals with the base, resulting in a relatively large size and weight. According to the technical solution of this application, by fixing the base of the integrated connector to the cover and BMS (e.g., threaded connection or welding), the connection reliability of the integrated connector can be ensured, preventing displacement and shaking, thereby guaranteeing the reliability of the energy storage device. Then, the cover and the housing are connected together by a second sealant with a certain hardness (e.g., structural adhesive). Thus, through their combined limiting connection, while ensuring a detachable and stable connection of the BMS board via threaded connection, the second sealant connection between the cover and the housing ensures connection strength while providing a certain degree of flexibility, acting as a buffer and absorbing stress. This prevents mutual pulling between the integrated connector and the cover, which could lead to seal failure, thus preventing moisture from entering the energy storage device and affecting its performance.

[0017] In addition, the connection method between the cover and the shell can also buffer the installation errors caused by rigid connection, avoid installation difficulties due to error accumulation, and extend the service life of the energy storage device. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the drawings only show some embodiments of this application and should not be considered as a limitation of the scope. It should also be understood that the same or similar reference numerals are used in the drawings to represent the same or similar elements. Furthermore, it should be understood that the drawings are merely schematic, and the dimensions and scale of the elements in the drawings are not necessarily precise.

[0019] Figure 1 This is a three-dimensional structural schematic diagram of an energy storage device according to an embodiment of the present application.

[0020] Figure 2 This is an exploded structural diagram of an energy storage device according to an embodiment of this application.

[0021] Figure 3 This is another exploded structural diagram of an energy storage device according to an embodiment of this application.

[0022] Figure 4This is a partial three-dimensional schematic diagram of an energy storage device according to an embodiment of this application.

[0023] Figure 5 This is a three-dimensional schematic diagram of another part of the structure of an energy storage device according to an embodiment of this application.

[0024] Figure 6 This is a three-dimensional schematic diagram of another part of the structure of an energy storage device according to an embodiment of this application.

[0025] Figure 7 This is a perspective view of the connector of an energy storage device according to an embodiment of this application.

[0026] Figure label:

[0027] 100. Energy storage devices;

[0028] 11. Connector; 111. Base; 112. Communication terminal; 113. Electrical connection terminal;

[0029] 12. BMS board; 121. First corner area; 122. Second corner area; 123. Bending angle;

[0030] 13. Cover; 131. Through hole; 132. Snap-fit ​​corner; 14. Shell; 141. Opening; 15. Receiving cavity;

[0031] 16. First seal; 17. Fixing element; 18. Electrode bracket; 19. First flexible connector; 20. Second flexible connector; 21. Busbar; 211. First end; 212. Second end; 213. Buffer plate; 22. Adapter; 221. Connecting pin; 222. Main board; 23. Second seal. Detailed Implementation

[0032] The embodiments of this application will be described in further detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0033] It should be noted that in this application, the height direction of the energy storage device is the Z direction shown in the figure, the width direction of the energy storage device is the Y direction shown in the figure, and the length direction of the energy storage device is the X direction shown in the figure.

[0034] To address the aforementioned problems in related technologies, this application provides an energy storage device and an electrical appliance having the same. Optionally, the energy storage device may be a start-stop battery pack, a low-voltage battery pack, a power battery pack, or an energy storage module, etc. The following describes... Figures 1 to 7The energy storage device provided in the embodiments of this application will be described.

[0035] It should be understood that there are many ways to implement this application, and it should not be construed as being limited to the embodiments described herein. The embodiments described herein are only for a more thorough and clear understanding of this application.

[0036] Exemplary energy storage device

[0037] refer to Figures 1 to 7 In a first aspect, embodiments of this application provide an energy storage device 100, which includes a connector 11, a BMS board 12, a cover 13, a plurality of fasteners 17, and a housing 14. The connector 11 includes a base 111 and communication terminals 112 and electrical connection terminals 113 disposed on the base 111. The base 111 is fixed to and electrically connected to the BMS board 12. The cover 13 has a through hole 131 through which the communication terminals 112 and electrical connection terminals 113 pass and extend to one side of the outer surface of the cover 13. A first sealing member 16 is provided between the inner surface of the cover 13 and the base 111, surrounding the through hole 131. Each of the plurality of fasteners 17 is fixedly connected to the cover 13 and the base 111. The cover 13 covers the opening 141 of the housing 14. The opening 141 is provided with a second seal 23, which seals the cover 13 and the housing 14. The Shore hardness of the second seal 23 is A, and HD 65≤A. The BMS plate 12 is located within the receiving cavity 15 formed by the inner surface of the cover 13 and the inner surface of the housing 14.

[0038] It should be noted that in related technologies, sealing rings and screw locking structures are typically provided around the perimeter of the connection between the cover 13 and the housing 14. If, on this basis, the integrated connector 11 is further connected to the cover 13 via threaded connections or other fasteners 17, the locking effect of the screws and bolts effectively creates two zero-contact surfaces between the cover 13 and the BMS and the housing 14. However, the cover 13 and housing 14 are typically manufactured using injection molding or die casting processes, resulting in certain surface tolerances. If the above implementation method is adopted, on the one hand, it may lead to difficulties in installing the cover 13 and housing 14; on the other hand, even if the cover 13 is installed on the housing 14, it may still suffer significant bending stress due to the mutual tension between the two rigid connections, thereby shortening its service life and making it less impact-resistant.

[0039] Furthermore, in related technologies, the sealing ring is typically made of flexible rubber with a Shore hardness between 20 and 50. Rubber of this hardness is relatively soft and has poor surface adhesion. If the embodiment of this application is adopted, since there is no fixed connection point between the cover 13 and the shell 14, the flexible rubber ring cannot effectively restrict the slight displacement of the cover 13 relative to the shell 14, which can easily cause some of the rubber ring to warp and form a leakage channel.

[0040] The connector 11 of this application embodiment integrates multiple terminals with the base 111 in one piece. Therefore, the connector 11 is larger in size and weight than the traditional method of setting the positive terminal, negative terminal and communication terminal separately.

[0041] According to the technical solution of this application, by fixing the base 111 of the integrated connector 11 to the cover 13 and BMS (e.g., threaded connection or welding), the connection reliability of the connector 11 can be guaranteed, and displacement and shaking can be avoided, thereby ensuring the reliability of the energy storage device 100. Then, the cover plate and the housing 14 are connected together by a second sealing member 23 (e.g., structural adhesive) with a certain hardness. Since the second sealing member 23 bonds and seals the cover 13 and the plate respectively, it can effectively limit the small displacement between the cover 13 and the housing 14 to form a leakage channel, thereby extending the service life of the energy storage device 100 and improving safety.

[0042] In this embodiment, through their combined limiting connection, while ensuring that the BMS board 12 is detachably and securely connected via threaded connection, the cover 13 and the housing 14 are connected by the second sealing element 23 to ensure connection strength, while also having a certain degree of flexibility, which can play a role in buffering and absorbing stress, avoiding mutual pulling between rigid connections and causing the seal between the integrated connector 11 and the cover 13 to fail, thereby preventing moisture from entering the energy storage device 100 and affecting the performance of the energy storage device 100.

[0043] In addition, the connection between the cover 13 and the housing 14 can also buffer the installation errors caused by rigid connection, avoid installation difficulties due to error accumulation, and extend the service life of the energy storage device 100.

[0044] In some embodiments, the Shore hardness of the second seal 23 is A, where A satisfies: HD 70≤A≤HD 90, for example, HD 71, HD 73, HD 75, HD 77, HD 81, HD 83, HD 85, HD 87 or HD 89, etc.

[0045] By controlling the hardness of the second seal 23 within this range, it is possible to avoid insufficient connection strength due to excessively low hardness, which would affect the airtightness of the energy storage device 100, or insufficient flexibility due to excessively high hardness, which would make it susceptible to breakage due to vibration and impact.

[0046] For example, the electrical connection terminal 113 may include a positive terminal and a negative terminal for connecting to the positive and negative terminals of an electrical device, respectively.

[0047] For example, the communication terminal 112 may be a plurality of communication pins. For example, the communication terminal 112 may be used to communicate with a controller to transmit signals such as the voltage of the energy storage device 100 to the controller, thereby enabling the controller to control the energy storage device 100 and the electrical equipment to execute relevant commands based on these signals.

[0048] The connection method of the positive terminal, negative terminal and communication terminal 112 on the BMS board 12 can refer to conventional technology in this field, and will not be described in detail here.

[0049] For example, the base 111 is an insulating base 111.

[0050] For example, one end of the base 111 over the BMS board 12 is provided with a connecting flange, which is connected to the cover 13 by screws or bolts and nuts. The screws or bolts can be evenly distributed on the connecting flange to ensure uniform force distribution.

[0051] For example, the first seal 16 is a sealing ring, such as a rubber ring.

[0052] For example, a sealing groove may be provided on the connecting flange, and a sealing ring is disposed in the sealing groove to press against the through hole 131 of the connecting flange and the cover 13. The sealing groove can limit the sealing ring.

[0053] Other structures of connector 11 can be referred to conventional settings in the art, and will not be described in detail here.

[0054] For example, the cover and housing 14 can be integrally formed, for example, by injection molding (e.g., integral injection molding of plastic) or casting (e.g., integral casting of metal). For example, the cover 13 can be an integrally formed plastic structure, and the housing 14 can be an integrally injection molded metal structure of aluminum or aluminum alloy.

[0055] For example, the second seal 23 is a structural adhesive.

[0056] For example, the structural adhesive can be epoxy resin adhesive, polyurethane adhesive, silicone or acrylic structural adhesive, etc.

[0057] For example, the top end face of the opening 141 of the housing 14 has a first groove opening upwards along its circumference, and the bottom end face of the cover 13 has a second groove opening downwards along its circumference. The first groove and the second groove engage and interlock, forming an interlocking gap. The interlocking gap between them constitutes an adhesive injection channel, which can be fixed and sealed together by structural adhesive in the adhesive injection channel to seal the cover 13 and the housing 14 together. The first groove and the second groove together constitute the wall structure at the connection position of the cover 13 and the housing 14, effectively ensuring the connection strength of the two together with the structural adhesive.

[0058] It should be noted that the first seal 16 is a rubber ring and has no adhesive properties, while the second seal 23 is a structural adhesive and has adhesive properties. Therefore, the position of the second seal 23 is "sealed connection".

[0059] In this application, the Shore hardness is obtained using a Shore hardness tester on a sample made of the same material as the second seal 23, prepared under the same conditions. The HD hardness tester uses a conical indenter (0.1 mm tip diameter, 30° cone angle). During testing, the indenter is perpendicularly pressed into the sample under a standard spring force (typically 44.5 N). The shallower the indentation depth, the higher the hardness value. The formula for calculating Shore hardness is: HD = 100 - (indentation depth / 0.025).

[0060] Before testing, check if the pointer points to "0" in the free state. If it deviates, adjust the dial to zero. Press the hardness tester onto a flat glass plate. When the indenter is in full contact with the glass, the pointer should point to 100±0.5HD. Otherwise, adjust or stop using the tester.

[0061] The sample dimensions should meet the following requirements: For plastic samples, a thickness of 50mm × 50mm × 6mm is recommended (or a minimum of 50mm × 15mm); for rubber samples, the thickness should be ≥6mm (if insufficient, ≤3 layers can be stacked). The sample surface must be smooth and flat, free from damage or impurities, and the edge should be ≥12mm from the indenter position. The experimental ambient temperature should be 23±5℃, and the sample must be conditioned at this temperature for ≥1 hour.

[0062] Before testing, place the sample on a solid, flat surface (such as a workbench) to ensure there is no vibration. Align the indenter with the test point, at least 12 mm from the edge of the sample, and ensure the indenter foot is in parallel contact with the sample surface.

[0063] For the handheld method, press the hardness tester vertically until its bottom surface fully contacts the sample, and read the instantaneous value within 1 second (or the stable value after 15 seconds). For the constant load support method, screw the hardness tester into the support, gently lift the lever to place the sample, and release the lever to allow the weight to press down naturally. After contact, read the value at the standard time (usually 1 second). Select ≥5 points (spaced ≥6mm) on the sample surface and take the average value as the final result.

[0064] refer to Figures 2 to 6 In some embodiments, the energy storage device 100 further includes a tab support 18 and a battery module (not shown) disposed within a receiving cavity 15, the battery module being electrically connected to the BMS via the tab support 18. Along the height direction of the energy storage device 100, the BMS board 12, the tab support 18, and the battery module are arranged sequentially. The BMS board 12 is connected to the tab support 18 via multiple first flexible connectors 19.

[0065] In some embodiments, the first flexible connector 19 may include a first plastic rivet and / or a first thermoplastic rivet. Thus, the BMS board 12 is connected to the tab support 18 via the first flexible connector 19 (e.g., the first plastic rivet and / or the first thermoplastic rivet). Due to the significant weight of the battery module, the inertia generated during its movement may act on the BMS board 12.

[0066] This design effectively prevents the shaking of the battery module from being transmitted to the BMS board 12, thereby affecting the connection strength and sealing of the cover 13 and the housing 14. In addition, this connection method has a certain degree of flexibility and can be deformed appropriately to better adapt to the rigid connection between the BMS board 12 and the integrated connector 11, avoiding mutual pulling that could lead to sealing failure between the cover 13 and the integrated connector 11.

[0067] It is understandable that the BMS board 12 and the tab bracket 18 can be connected entirely by the first plastic rivet or the first hot melt rivet, or partly by plastic rivets and partly by hot melt rivets, as long as the connection between them has a certain degree of flexibility.

[0068] The cover 13 is connected to the housing 14 by a plurality of second flexible connectors 20, which are arranged around the second seal 23.

[0069] In some embodiments, the second flexible connector 20 may include a second plastic rivet and / or a second thermoplastic rivet. Thus, by using the second flexible connector 20 (e.g., the second plastic rivet and / or the second thermoplastic rivet) to achieve a flexible connection between the cover 13 and the housing 14, allowing for appropriate deformation to better adapt to the rigid connection between the integrated connector 11 and the BMS board 12 and the cover 13, and avoiding the failure of the seal between the integrated connector 11 and the cover 13 due to pulling on the integrated connector 11, the connection strength between the cover 13 and the housing 14 can be further improved by using plastic rivets or thermoplastic rivets. Furthermore, the multiple second flexible connectors 20 arranged around the second seal 23 can reduce the stress on the second seal 23 in multiple directions.

[0070] In some examples, multiple second flexible connectors 20 are arranged on the outside of the second seal 23.

[0071] In this way, multiple fixing points can be formed on the outside of the second seal 23, and the lever arm is longer, so as to further improve the connection stability and sealing performance of the second seal 23 to the cover 13 and the housing 14.

[0072] During installation, the cover 13 and the housing 14 can be connected and positioned first using plastic rivets or hot-melt rivets. Then, structural adhesive is injected between them to prevent displacement of the cover 13 and housing 14 during the adhesive injection process. Moreover, after the adhesive is injected, the integrated structure formed by the plastic rivets or hot-melt rivets and the structural adhesive can further improve the connection strength between the cover 13 and the housing 14, thereby improving the structural strength of the energy storage device 100.

[0073] It is understandable that the cover 13 and the shell 14 can be connected entirely by the first plastic rivet or the first hot melt rivet, or partly by plastic rivets and partly by hot melt rivets, as long as the connection between them has a certain degree of flexibility.

[0074] refer to Figures 2 to 6 In some embodiments, the energy storage device 100 may further include a busbar 21 and an adapter 22. The busbar 21 may be mounted on the tab bracket 18. A first end 211 of the busbar 21 is electrically connected to the battery module, and a second end 212 of the busbar 21 is electrically connected to the BMS board 12. A buffer plate 213 is provided between the first end 211 and the second end 212. The adapter 22 includes a main board 222 and a plurality of connection pins 221 connected to the periphery of the main board 222. The plurality of connection pins 221 are electrically connected to the BMS board 12, and the main board 222 is electrically connected to the second end 212.

[0075] By setting the adapter 22 and placing the connection pins 221 on the adapter 22, a greater number of connection pins 221 can be provided compared to placing the connection pins 221 on the cross-section of the busbar 21, thereby increasing the current-carrying area. In addition, the adapter 22 can also play a certain role in buffering.

[0076] For example, multiple connection pins 221 can be passed through the BMS board 12 and fixed by spot welding.

[0077] For example, one end of the busbar 21 is fixedly connected (e.g., threaded) to the tab holder 18.

[0078] For example, the bus 21 can be made of aluminum or copper. Copper is chosen to improve current carrying capacity, while aluminum is chosen to reduce cost.

[0079] refer to Figure 6In some implementations, the buffer plate 213 is arranged in a zigzag pattern with the first end 211 and the second end 212. This structure can improve shock resistance by providing cushioning through the connection points between the zigzags. The plurality of connection pins 221 may include at least four connection pins 221, which are spaced apart along the periphery of the motherboard 222.

[0080] In some examples, both the first end 211 and the second end 212 are plate-shaped.

[0081] In some embodiments, the motherboard 222 is rectangular.

[0082] In some examples, the motherboard 222 has 6 pins around its perimeter, with 2 pins spaced apart on each long side of the rectangular motherboard 222 and 1 pin on each short side, to ensure structural strength and overcurrent capacity.

[0083] refer to Figures 1 to 6 In some embodiments, the connector 11 is fixedly connected (e.g., by spot welding or patch bonding) to a first corner region 121 of the BMS board 12. Each first flexible connector 19 is evenly distributed on at least one second corner region 122 of the BMS board 12 away from the connector 11. For example, plastic rivets or thermoplastic rivets may be evenly distributed on three second corner regions 122 of the BMS board 12 away from the integral connector 11.

[0084] The connector 11's connection terminals are typically connected to the battery module via the BMS board 12. Thus, the connector 11, along with plastic or thermoplastic rivets, are generally evenly distributed in the corner area of ​​the BMS board 12, allowing for coordinated and uniform fixation of the BMS board 12. This ensures that the force on the BMS board 12 is relatively even, preventing localized warping due to uneven force. Furthermore, the connector 11's location in the first corner area 121 of the BMS board 12 avoids interference with other structures.

[0085] It should be noted that the first corner region 121 can be understood as a corner position on the BMS board 12 and the area near that corner position, and the second corner region 122 can be understood as other corner positions on the BMS board 12 besides the aforementioned corner and the area near those corner positions.

[0086] For example, the BMS board 12 in this embodiment is a rectangular board, and the corner areas of its four sides can be regarded as corner areas, and the connector 11 is arranged in one of the corner areas, namely the first corner area 121.

[0087] refer to Figures 2 to 5In some embodiments, the first corner region 121 of the BMS board 12 is formed with a bending angle 123, and the cover 13 and / or the shell 14 are provided with a snap-fit ​​angle 132 corresponding to the position of the first corner region 121, with the bending angle 123 and the snap-fit ​​angle 132 being provided in a corresponding manner.

[0088] In this way, the integrated connector 11 can be further limited by the engagement of the snap-fit ​​angle 132 and the bending angle 123. This not only allows for slight vertical displacement of the first corner region 121 of the BMS board 12 in the height direction, but also effectively restricts the horizontal movement and displacement of the first corner region 121 of the BMS board 12.

[0089] In some embodiments, the energy storage device 100 may further include a plurality of pouch cells (not shown in the figure), which are stacked to form a battery module. The plurality of pouch cells are electrically connected to the BMS board 12 and disposed within the receiving cavity 15, and an adhesive layer (not shown in the figure) is disposed between the plurality of pouch cells and the inner wall surface of the receiving cavity 15.

[0090] In this way, the adhesive layer can fix the pouch cell within the receiving cavity 15, preventing the pouch cell from shaking and pulling on the tabs or causing damage, thereby improving the reliability of the energy storage device 100. Furthermore, it can also improve the overall structural strength of the energy storage device 100. Then, the adhesive layer can also absorb vibrations and shocks experienced during use, further improving the safety and reliability of the energy storage device 100.

[0091] For example, the tabs of the pouch cell can be fixed to the busbar 21 provided on the tab holder 18, and the busbar 21 enables electrical connection with the BMS board 12. For instance, the tabs of the pouch cell can be soldered to the busbar 21 provided on the tab holder 18.

[0092] For example, the adhesive layer may be silicone or polyurethane adhesive.

[0093] In some alternative embodiments, the energy storage device 100 may further include a plurality of prismatic battery cells (not shown in the figure), which are electrically connected to the BMS board 12. The plurality of prismatic battery cells are disposed within the receiving cavity 15 and form a battery module. The battery module has end plates (not shown in the figure) disposed on both sides along the width direction of the energy storage device 100, and the end plates are received within the receiving cavity 15 and snapped into the battery module.

[0094] In this way, multiple prismatic cells can be fixed in the receiving cavity 15 by the end plate, filling the gaps between the prismatic cells and the cover 13 and housing 14, preventing the prismatic cells from shaking and pulling on the tabs or causing damage to the prismatic cells, thereby improving the reliability of the energy storage device 100. In addition, it can also improve the overall structural strength of the energy storage device 100. Then, the end plate can also absorb the vibration and impact during use, further improving the safety and reliability of the energy storage device 100.

[0095] For example, the end plate can be made of epoxy resin.

[0096] In some embodiments, the thickness of the end plate gradually decreases along the direction from the opening 141 toward the inner bottom surface of the housing 14, and the side surfaces on both sides of the end plate are respectively attached to the outer surface of the battery module and the inner surface of the housing 14.

[0097] In this way, the shape and size of the end plate can be adapted to the size and shape of the inner wall of the housing 14, such as the draft angle of the housing 14, so as to better fix the square battery, avoid the square battery cell from shaking and pulling the tabs or causing damage to the square battery cell, and further improve the reliability of the energy storage device 100.

[0098] In some embodiments, the bottom of the battery module is bonded to the inner bottom surface of the housing 14. This further secures the battery module, preventing it from shaking or shifting, thereby avoiding the prismatic cells from shaking and pulling on the tabs or causing damage to the prismatic cells, and further improving the reliability of the energy storage device 100.

[0099] In some embodiments, the end plate can be wedge-shaped in cross-section along the height direction of the energy storage device 100, with the side surfaces of the end plate respectively attached to the outer surface of the battery module and the inner surface of the housing 14. The bottom of the battery module is bonded to the bottom of the housing 14.

[0100] It is understood that those skilled in the art can combine some or all of the features of the above embodiments as needed, without conflict, to form new embodiments. For example, improved embodiments can be combined with each other. For the sake of brevity, this application will not list all possible combinations.

[0101] In this application, the energy storage device 100 can be a battery module, a start-stop battery pack, a power battery pack, or an energy storage module, etc.

[0102] Exemplary electrical equipment

[0103] An embodiment of this application also provides an electrical device including the battery 100 described above. The electrical device has the corresponding effects of the battery described above, which will not be repeated here.

[0104] It should be noted that the electrical equipment mentioned in this application can be energy storage equipment, such as energy storage cabinets, or power consuming equipment, such as automobiles, drones, and power tools.

[0105] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0106] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0107] It should be understood that the term "comprising" and its variations as used in this application are open-ended, meaning "including but not limited to". The term "according to" means "at least in part according to". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least another embodiment".

[0108] It should be understood that although terms such as “first” or “second” may be used in this application to describe various elements (such as a first edge and a second edge), these elements are not defined by these terms, which are only used to distinguish one element from another.

[0109] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0110] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0111] The scope of protection of this application is not limited to the above embodiments. Any variations or substitutions that can be conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An energy storage device, characterized in that, include: A connector, comprising a housing and communication terminals and electrical connection terminals disposed on the housing; BMS board, the base is fixed to and electrically connected to the BMS board; The cover has a through hole, through which the communication terminal and the electrical connection terminal pass and extend to one side of the outer surface of the cover. A first sealing element is provided between the inner surface of the cover and the seat, which is arranged around the through hole. Multiple fasteners, each of which is fixedly connected to the cover and the base; as well as The housing has a cover that covers the opening of the housing. A second seal is provided at the opening. The second seal seals the cover and the housing. The Shore hardness of the second seal is A, and HD 65≤A. The BMS plate is located within the receiving cavity formed by the inner surface of the cover and the inner surface of the housing.

2. The energy storage device according to claim 1, characterized in that, It also includes a tab support and a battery module disposed in the receiving cavity, the battery module being electrically connected to the BMS through the tab support; along the height direction of the energy storage device, the BMS board, the tab support and the battery module are arranged in sequence, the BMS board being connected to the tab support through a plurality of first flexible connectors; the cover is connected to the housing through a plurality of second flexible connectors, the plurality of second flexible connectors being arranged around the second sealing element.

3. The energy storage device according to claim 2, characterized in that, The first flexible connector includes a first plastic rivet and / or a first thermoplastic rivet, and / or, The second flexible connector includes a second plastic rivet and / or a second thermoplastic rivet.

4. The energy storage device according to claim 2, characterized in that, It also includes a busbar, which is mounted on the tab bracket. The first end of the busbar is electrically connected to the battery module, and the second end of the busbar is electrically connected to the BMS board. A buffer plate is provided between the first end and the second end. as well as An adapter, comprising a motherboard and a plurality of connection pins connected to the periphery of the motherboard, the plurality of connection pins being electrically connected to the BMS board, and the motherboard being electrically connected to the second end.

5. The energy storage device according to claim 4, characterized in that, The buffer plate is arranged in a zigzag pattern with the first end and the second end; the plurality of connection pins includes at least 4 connection pins, which are arranged at intervals along the periphery of the motherboard.

6. The energy storage device according to claim 5, characterized in that, The motherboard is a rectangular board.

7. The energy storage device according to claim 2, characterized in that, The connector is fixedly connected to the first corner region of the BMS board, and each of the first flexible connectors is evenly distributed on at least one second corner region of the BMS board away from the connector; as well as The first corner region of the BMS board has a bending angle, and the cover and / or the housing are provided with a snap-fit ​​angle at the position corresponding to the first corner region, with the bending angle and the snap-fit ​​angle being provided in a corresponding manner.

8. The energy storage device according to claim 1, characterized in that, The Shore hardness of the second seal is A, and A satisfies: HD 70≤A≤HD 90.

9. The energy storage device according to any one of claims 1 to 8, characterized in that, It also includes multiple pouch cells, which are stacked to form a battery module. The multiple pouch cells are electrically connected to the BMS board. The multiple pouch cells are disposed in the receiving cavity, and an adhesive layer is provided between the multiple pouch cells and the inner wall of the receiving cavity.

10. The energy storage device according to any one of claims 1 to 8, characterized in that, It also includes multiple square-shell battery cells, which are electrically connected to the BMS board and disposed in the receiving cavity. The multiple square-shell battery cells form a battery module. The battery module has end plates disposed on both sides along the width direction of the energy storage device. The end plates are accommodated in the receiving cavity and snapped into the battery module.

11. The energy storage device according to claim 10, characterized in that, Along the direction from the opening towards the inner bottom surface of the housing, the thickness of the end plate gradually decreases, and the side surfaces on both sides of the end plate respectively conform to the outer surface of the battery module and the inner surface of the housing; and / or, The bottom of the battery module is bonded to the inner bottom surface of the housing.

12. An electrical appliance, characterized in that, Includes the energy storage device according to any one of claims 1 to 11.

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