Battery, power utilization device and energy storage device

Abstract

The utility model provides a battery, a power utilization device and an energy storage device, and belongs to the technical field of batteries. The battery comprises a box body, a battery monomer, a communicating pipeline and a sealing flange, the box body is provided with a containing space, a first communicating opening and a plurality of connecting holes, the first communicating opening communicates with the containing space, and the connecting holes surround the first communicating opening at intervals; the battery monomers are positioned in the accommodating space; one end of the communicating pipeline is located outside the accommodating space, and the other end of the communicating pipeline penetrates through the first communicating opening to communicate with the accommodating space; the sealing flange comprises a lock cover and a plurality of lock catches, the lock cover is attached to the box body, the communicating pipeline penetrates through the lock cover, the lock catches correspond to the connecting holes one to one, the lock catches surround the communicating pipeline at intervals, one ends of the lock catches are connected with the surface of the side, facing the box body, of the lock cover, and the other ends of the lock catches penetrate through the connecting holes and are connected with the box body. According to the battery provided by the invention, the assembly convenience of the battery can be improved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery, an electrical device, and an energy storage device. Background Art

[0002] Energy conservation and emission reduction are key to sustainable social development. Rechargeable batteries, with their ability to store and release energy as needed, are widely used in various electrical devices and energy storage systems, playing a crucial role in promoting energy transformation and sustainable development. Battery technology is a crucial factor in the development of the new energy industry.

[0003] During battery assembly, fasteners are often used to secure flanges to mounting interfaces. For example, fasteners and flanges can connect the battery case to pipes or other structures, resulting in a large number of parts involved in battery assembly and a complex installation process. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background art. To this end, one object of the present application is to provide a battery, an electrical device and an energy storage device to improve the assembly convenience of the battery.

[0005] An embodiment of the first aspect of the present application provides a battery, comprising a housing, a battery cell, a communication pipe, and a sealing flange. The housing comprises a storage space, a first communication port, and a plurality of connection holes, wherein the first communication port is connected to the storage space, and the plurality of connection holes are spaced around the first communication port; the battery cell is located within the storage space; one end of the communication pipe is located outside the storage space, and the other end of the communication pipe passes through the first communication port and is connected to the storage space; the sealing flange comprises a locking cover and a plurality of locking buckles, wherein the locking cover is fitted to the housing, the communication pipe passes through the locking cover, the plurality of locking buckles correspond to the plurality of connection holes one-to-one, the plurality of locking buckles are spaced around the communication pipe, one end of the locking buckle is connected to a surface of the locking cover facing the housing, and the other end of the locking buckle passes through the connection hole and is connected to the housing.

[0006] In the technical solution of the embodiment of the present application, the sealing flange serves as a connector connecting the box body and the connecting pipe. Its structure is simple, and multiple locks make it possible to connect the sealing flange to the first connecting port without the need for other fasteners. That is, the self-locking function can be achieved through the structure of multiple locks. The operation is simple and convenient, and the number of parts in the battery assembly process can be reduced, thereby improving the assembly convenience of the battery.

[0007] In some embodiments, a first mounting groove is formed on a surface of the locking cover facing the housing, with the opening of the first mounting groove facing the housing. The sealing flange further includes a sealing core, which is positioned within the first mounting groove. The communication conduit extends through the sealing core, and the plurality of locking latches surround the sealing core at intervals. The provision of the sealing core can enhance the sealing effect of the sealing flange on the first communication opening, thereby maintaining airtightness within the housing and increasing the service life of the battery.

[0008] In some embodiments, the surface of the sealing core surrounding the connecting pipe includes a second annular mounting groove, and the sealing flange further includes a first sealing ring positioned within the second mounting groove and surrounding the connecting pipe. The first sealing ring can enhance the sealing between the sealing core and the connecting pipe, thereby improving the sealing between the sealing flange and the connecting pipe, thereby enhancing the sealing effect of the sealing flange on the first connecting port, thereby facilitating airtightness within the housing.

[0009] In some embodiments, the lock includes a first elastic arm and a second elastic arm, one end of the first elastic arm and one end of the second elastic arm are both connected to a surface of the lock cover facing the housing; wherein the other end of the first elastic arm and the other end of the second elastic arm are spaced apart from each other, the other end of the first elastic arm has a first protrusion, and the other end of the second elastic arm has a second protrusion, the first protrusion is located on a side of the first elastic arm away from the second elastic arm, and the second protrusion is located on a side of the second elastic arm away from the first elastic arm, and the first protrusion and the second protrusion pass through the connection hole and abut against the housing. The first elastic arm and the second elastic arm enable the lock to move closer to each other under the action of squeezing when passing through the connection hole and automatically rebound after passing through the connection hole, thereby facilitating the installation and connection of the sealing flange and the housing. The first protrusion and the second protrusion can also fix the sealing flange at the connection hole, reducing the risk of the sealing flange falling from the connection hole, maintaining the stability of the connection between the connecting pipe and the housing, and improving the reliability of the battery.

[0010] In some embodiments, the first elastic arm and the second elastic arm are arranged in a first direction, and the first elastic arm and the second elastic arm meet at least one of the following conditions: the first protrusion has a side surface away from the second elastic arm that serves as a first guide surface, and the first guide surface causes the first protrusion to gradually increase in size along the first direction from the other end of the first elastic arm to the one end of the first elastic arm; the second protrusion has a side surface away from the first elastic arm that serves as a second guide surface, and the second guide surface causes the second protrusion to gradually increase in size along the first direction from the other end of the second elastic arm to the one end of the second elastic arm. The first guide surface and the second guide surface enable the locking latch to pass through the connection hole quickly and smoothly, thereby improving the assembly efficiency of the sealing flange and the housing.

[0011] In some embodiments, the locking cover has an annular third mounting groove on a side facing the housing. The third mounting groove surrounds the plurality of locking latches. The sealing flange also includes a second sealing ring located within the third mounting groove. The second sealing ring can enhance the seal between the sealing flange and the housing, thereby enhancing the sealing effect of the sealing flange on the first communication port, thereby facilitating airtightness within the housing.

[0012] In some embodiments, the housing includes a main body and a heat exchange bottom plate. The main body includes a bottom wall and side walls, which form a storage space, and the first communication port is located in at least one of the bottom wall and the side wall. The heat exchange bottom plate is located within the storage space and is connected to the main body so as to divide the storage space into a mounting cavity and a first heat exchange cavity. The battery cell is located in the mounting cavity, and the first communication port is connected to at least one of the mounting cavity and the first heat exchange cavity. By providing the heat exchange bottom plate, the first heat exchange cavity can be used to exchange heat with the battery cell, allowing the battery cell to operate at an appropriate temperature and improving the temperature stability of the battery cell.

[0013] In some embodiments, a first communication port is located on a side wall and communicates with the mounting cavity. The heat exchange base plate has a second communication port that communicates with both the mounting cavity and the first heat exchange cavity. The other end of the communication pipe sequentially passes through the first and second communication ports to communicate with the first heat exchange cavity. While maintaining the enclosure closed, the heat exchange medium in the first heat exchange cavity can be replenished or adjusted at any time through the communication pipe. This operation is simple and quick, improving the reliability and temperature stability of the battery cells.

[0014] In some embodiments, a positioning protrusion is provided on a surface of the heat exchange base plate facing the mounting cavity. The positioning protrusion is located between the second and first communicating ports along the direction through which the first communicating port extends, and the other end of the communicating pipe abuts against the positioning protrusion. The positioning protrusion allows the communicating pipe to abut against the positioning protrusion when the communicating pipe is disposed in the second communicating port, thereby securing the communicating pipe in position at the second communicating port and facilitating connection between the communicating pipe and the heat exchange base plate.

[0015] In some embodiments, the battery further includes a heat exchange side plate, which is located within the mounting cavity and positioned on at least one side of the battery cell. The heat exchange side plate is connected to the heat exchange bottom plate and has a second heat exchange cavity, which is connected to the first heat exchange cavity. By providing the heat exchange bottom plate and the heat exchange side plate, the first heat exchange cavity and the second heat exchange cavity can be used simultaneously to exchange heat on different surfaces of the battery cell, thereby improving the heat exchange efficiency of the battery cell.

[0016] In some embodiments, a battery cell has two opposing first surfaces, two opposing second surfaces, and two opposing third surfaces. The area of ​​the first surface is greater than that of the second surface, and the area of ​​the first surface is greater than that of the third surface. The heat exchange bottom plate is in contact with one of the second and third surfaces, and the heat exchange side plate is in contact with the other of the second and third surfaces. During the battery cell's charge and discharge cycles, when it reaches a certain life cycle, gas generation occurs within the battery cell, causing the surface of the battery cell to expand. Compared to the second and third surfaces of the battery cell, the first surface of the battery cell experiences the greatest expansion and is subject to greater stress. Providing the heat exchange bottom plate and heat exchange side plates in contact with the second and third surfaces of the battery cell ensures that even if the battery cell expands, the heat exchange bottom plate and heat exchange side plates are less likely to be damaged. This reduces the risk of deformation or damage to the heat exchange bottom plate and heat exchange side plates due to expansion forces, thereby minimizing the impact on the heat exchange performance of the battery cell and improving battery reliability.

[0017] In some embodiments, the surface of the heat exchange side plate near the battery cell has a heat conductive layer. The heat conductive layer helps to make the distance between the heat exchange side plate and the battery cell closer or closer, facilitating heat exchange between the battery cell and the heat exchange side plate, and improving heat exchange efficiency and effect. At the same time, the heat conductive layer can also have a certain buffering capacity, which can absorb part of the expansion of the battery cell, reduce the squeezing effect of the expansion on the second heat exchange cavity in the heat exchange side plate, maintain a relatively stable heat exchange effect between the heat exchange side plate and the battery cell, and improve battery reliability.

[0018] An embodiment of the second aspect of the present application provides an electrical device, which includes the battery in the above embodiment, and the battery is used to provide electrical energy.

[0019] An embodiment of the third aspect of the present application provides an energy storage device, which includes the battery in the above embodiment, and the battery is used to store electrical energy.

[0020] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar components or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0022] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0023] Figure 2 This is one of the structural schematic diagrams of batteries in some embodiments of the present application;

[0024] Figure 3 A side view of a box provided in an embodiment of the present application;

[0025] Figure 4 for Figure 3 A partial enlarged view of part B in the middle;

[0026] Figure 5 This is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0027] Figure 6 This is a schematic structural diagram of the connecting pipes in some embodiments of the present application;

[0028] Figure 7 This is a schematic structural diagram of a sealing flange in some embodiments of the present application;

[0029] Figure 8 This is a schematic diagram of the exploded structure of the sealing flange in some embodiments of the present application;

[0030] Figure 9 This is a partial cross-sectional schematic diagram of the assembly of the box and the connecting pipe in some embodiments of the present application;

[0031] Figure 10 A top view of a heat exchange base plate according to some embodiments of the present application;

[0032] Figure 11 for Figure 10 A partial enlarged view of the middle C part;

[0033] Figure 12 This is one of the partial structural schematic diagrams of batteries according to some embodiments of the present application;

[0034] Figure 13 This is a schematic structural diagram of a heat exchange side plate in some embodiments of the present application;

[0035] Figure 14 This is the second structural diagram of the battery of some embodiments of the present application.

[0036] Description of reference numerals:

[0037] 1000, vehicle; 1001, battery; 1002, controller; 1003, motor; 10, housing; 10a, storage space; 10b, mounting cavity; 10c, first heat exchange cavity; 11, body; 111, bottom wall; 112, side wall; 121, first connecting port; 122, connecting hole; 20, battery cell; 21, end cap; 21a, electrode terminal; 22, housing; 23, electrode assembly; 23a, tab; 30, heat exchange bottom plate; 31, second connecting port; 32, positioning protrusion; 40, connecting pipe; joint plug cover 41; hand piece installation Mounting groove 42; 43, protrusion; 50, sealing flange; 51, locking cover; 511, third mounting groove; 52, locking buckle; 521, first elastic arm; 5211, first protrusion; 5211a, first guide surface; 522, second elastic arm; 5221, second protrusion; 5221a, second guide surface; 54, second sealing ring; 53, first sealing ring; 55, sealing core; 551, second mounting groove; 56, first mounting groove; 60, heat exchange side plate; 61, heat conducting layer; 70, first current collector; 80, bottom guard plate; 90, buffer layer. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present application will be described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application and are therefore only examples and are not intended to limit the scope of protection of the present application.

[0039] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned figure descriptions are intended to cover non-exclusive inclusions.

[0040] In the description of the embodiments of this application, the technical terms "first" and "second" are used only to distinguish different objects and should not be understood to indicate or imply relative importance or implicitly specify the quantity, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0041] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0042] In the description of the embodiments of this application, the term "and / or" is simply a description of the association relationship between associated objects, indicating that three relationships can exist. For example, A and / or B can represent the following three situations: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0043] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0044] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0045] In the description of the embodiments of the present application, unless otherwise expressly specified or limited, technical terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; internal connections between two components or interactions between two components. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the present application based on specific circumstances.

[0046] Currently, market developments indicate that rechargeable batteries are becoming increasingly widely used. They are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but are also widely used in various electronic devices, including electric vehicles like electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, market demand is also growing.

[0047] During battery assembly, fasteners are often used to secure flanges to the mounting interface. For example, the pipe to be connected can be passed through the mounting hole of the battery case. Two flanges are then placed around the pipe, one on each side of the mounting hole. Fasteners are then inserted through the connection holes of the two flanges to connect them, thereby achieving a fixed connection between the pipe to be connected and the battery case. Because flanges often need to be used in conjunction with fasteners, the battery assembly process involves a large number of parts and a complex installation process.

[0048] Based on the above considerations, the present application designs a battery, including a housing, a battery cell, a connecting pipe, and a sealing flange. The housing has a storage space, a first connecting port, and a plurality of connection holes. The first connecting port is connected to the storage space, and the plurality of connection holes are spaced around the first connecting port. The battery cell is located within the storage space. One end of the connecting pipe is located outside the storage space, and the other end of the connecting pipe passes through the first connecting port and is connected to the storage space. The sealing flange includes a locking cover and a plurality of locking buckles. The locking cover is fitted to the housing, and the connecting pipe passes through the locking cover. The plurality of locking buckles correspond to the plurality of connection holes one by one, and the plurality of locking buckles are spaced around the connecting pipe. One end of the locking buckle is connected to the surface of the locking cover facing the housing, and the other end of the locking buckle passes through the connection hole and is connected to the housing.

[0049] The sealing flange serves as a connector connecting the box body and the connecting pipe. Its structure is simple. Multiple locks make it possible to connect the sealing flange to the first connecting port without the need for other fasteners. That is, the self-locking function can be achieved through the structure of multiple locks. The operation is simple and convenient, and the number of parts in the battery assembly process can be reduced, thereby improving the assembly convenience of the battery.

[0050] The battery cells disclosed in the embodiments of this application can be used, but are not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. A power supply system comprising the battery disclosed in this application can be formed into the electrical device or energy storage device.

[0051] The present invention provides an electric device that uses a battery as a power source. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery-powered vehicle, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0052] An embodiment of the present application also provides an energy storage device that uses a battery as a power source. The energy storage device may be, but is not limited to, an energy storage container, an energy storage cabinet, an energy storage power station, an energy storage battery pack, or a portable energy storage system.

[0053] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0054] Please refer to Figure 1 , Figure 1 Schematic diagram of the structure of the vehicle provided for some embodiments of the present application. Vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 1001 is provided inside the vehicle 1000, and the battery 1001 can be provided at the bottom, head or tail of the vehicle 1000. The battery 1001 can be used to power the vehicle 1000. For example, the battery 1001 can serve as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1002 and a motor 1003. The controller 1002 is used to control the battery 1001 to power the motor 1003, for example, for starting, navigating and operating power requirements of the vehicle 1000 during driving.

[0055] In some embodiments of the present application, the battery 1001 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0056] Figure 2 This is one of the schematic diagrams of the battery structure of some embodiments of the present application, see Figure 2 The battery 1001 includes a box body 10, a battery cell 20, a connecting pipe 40 and a sealing flange 50. Figure 3 This is a side view of a box provided in an embodiment of the present application. Figure 4 for Figure 3 A partial enlarged view of part B in the middle. Figure 5 This is a schematic diagram of the exploded structure of a battery cell in some embodiments of the present application. Figure 6 This is a schematic diagram of the structure of the connecting pipes in some embodiments of the present application. Figure 7 This is a schematic diagram of the structure of the sealing flange in some embodiments of the present application. Figures 2 to 7The box body 10 has a accommodating space 10a, a first communicating port 121 and a plurality of connecting holes 122, the first communicating port 121 is connected to the accommodating space 10a, and the plurality of connecting holes 122 are spaced around the first communicating port 121; the battery cell 20 is located in the accommodating space 10a; one end of the communicating pipe 40 is located outside the accommodating space 10a, and the other end of the communicating pipe 40 passes through the first communicating port 121 and is connected to the accommodating space 10a; the sealing flange 50 includes a locking cover 51 and a plurality of locking buckles 52, the locking cover 51 is fitted with the box body 10, the communicating pipe 40 passes through the locking cover 51, the plurality of locking buckles 52 correspond one-to-one to the plurality of connecting holes 122, and the plurality of locking buckles 52 are spaced around the communicating pipe 40, one end of the locking buckle 52 is connected to the side surface of the locking cover 51 facing the box body 10, and the other end of the locking buckle 52 passes through the connecting hole 122 and is connected to the box body 10.

[0057] In some embodiments, the box body 10 can be formed by a stamping process. For example, a suitable sheet material is selected and placed between a male die and a female die. The edges of the sheet material are fixed, and the male die presses the sheet material into the female die, thereby forming a box-shaped structure with side walls 112 and a bottom wall 111. The box body 10 is then formed through subsequent processes such as trimming, flanging, and deburring.

[0058] In the embodiment of the present application, the shape of the accommodation space 10a can be various. The shape of the accommodation space 10a can be a cylinder or a rectangular parallelepiped, etc. The shape of the accommodation space 10a is not limited thereto.

[0059] See also Figure 3 and Figure 4 The first communication port 121 and the plurality of connection holes 122 are also connected to the accommodating space 10 a. The first communication port 121 and the plurality of connection holes 122 are located on the same side of the box body 10 .

[0060] In some embodiments, the first communication port 121 and the connection hole 122 may be formed on the box body 10 by laser cutting or blanking.

[0061] In some embodiments, the shape of the first communication port 121 and the shape of the connection hole 122 include but are not limited to circle, square, or triangle, etc. The shape of the first communication port 121 and the shape of the connection hole 122 can be the same or different.

[0062] The penetration direction of the first communication port 121 and the penetration direction of the connection hole 122 intersect with the surface of the box body 10 where they are located. For example, the penetration direction of the first communication port 121 and the penetration direction of the connection hole 122 are both perpendicular to the surface of the box body 10 where they are located.

[0063] Along the penetrating direction of the first communicating opening 121 , the aperture of the first communicating opening 121 may be uniform everywhere, or may not be completely uniform.

[0064] Along the penetrating direction of the connecting hole 122 , the diameter of the connecting hole 122 may be uniform everywhere, or may not be completely uniform.

[0065] In some embodiments, the plurality of connection holes 122 may be evenly spaced apart along the circumference of the first communication port 121. For example, the number of the connection holes 122 may be six.

[0066] The size of the connection hole 122 may be smaller than that of the first communication port 121 .

[0067] In the battery 1001, there may be multiple battery cells 20, which may be connected in series, in parallel, or in a hybrid connection. A hybrid connection refers to a combination of series and parallel connections among the multiple battery cells 20. The multiple battery cells 20 may be directly connected in series, in parallel, or in a hybrid connection, and then the entire battery cell 20 may be housed within the housing 10. Alternatively, the battery 1001 may be constructed by first connecting multiple battery cells 20 in series, in parallel, or in a hybrid connection to form a battery module, which is then connected in series, in parallel, or in a hybrid connection to form a single unit housed within the housing 10. The battery 1001 may also include other structures, such as a busbar assembly for electrically connecting the multiple battery cells 20.

[0068] Battery cell 20 is the smallest unit that makes up battery 1001. Battery cell 20 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. Battery cell 20 can be cylindrical, flat, rectangular, or in other shapes.

[0069] See also Figure 5 The battery cell 20 includes an end cap 21, an electrode terminal 21a, a housing 22, an electrode assembly 23 and other functional components.

[0070] The end cap 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cap 21 can be adapted to the shape of the shell 22 to match the shell 22. Functional components such as electrode terminals 21a can be provided on the end cap 21. The electrode terminal 21a can be used to electrically connect to the electrode assembly 23 for outputting or inputting electrical energy of the battery cell 20. In some embodiments, the end cap 21 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold. In some embodiments, an insulating member can also be provided on the inner side of the end cap 21, and the insulating member can be used to isolate the electrical connection components in the shell 22 from the end cap 21 to reduce the risk of short circuit.

[0071] The housing 22 is a component used to cooperate with the end cap 21 to form an internal environment of the battery cell 20 , wherein the formed internal environment can be used to accommodate the electrode assembly 23 , electrolyte and other components.

[0072] The electrode assembly 23 is a component in the battery cell 20 where electrochemical reactions occur. One or more electrode assemblies 23 may be contained in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly, and the parts of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive and negative electrode tabs may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery 1001, the positive electrode active material and the negative electrode active material react with the electrolyte, and the tabs 23a connect the electrode terminals to form a current loop.

[0073] It can be understood that the other end of the communication pipe 40 can be in communication with the first communication port 121 , so that the accommodating space 10 a can be in communication with other devices outside the box body 10 .

[0074] The connecting pipe 40 may be made of metal materials such as copper and copper alloys, stainless steel, aluminum alloys, aluminum, etc., or non-metal materials such as plastic, polypropylene, and rigid polyvinyl chloride. For example, the connecting pipe 40 is made of AL3003.

[0075] The embodiment of the present application does not limit the specific shape of the connecting pipe 40. For example, see Figure 6 The connecting pipe 40 may be formed into an L-shaped bent aluminum pipe by a bending process. The cross-sectional shape of the connecting pipe 40 may be circular.

[0076] See also Figure 2 Battery 1001 may also include a joint plug 41. This plug 41 covers the other end of the connecting pipe 40, protecting the connecting pipe 40 and the first heat exchange channel from dust and the joint. The joint plug 41 can be manufactured using an injection molding process. The present embodiment does not limit the material or shape of the joint plug 41.

[0077] In some embodiments, the size of the joint plug 41 can be larger than the size of the other end opening of the connecting pipe 40, so that the joint plug 41 can be sleeved on the outer circumference of the connecting pipe 40. In other embodiments, the size of the joint plug 41 can also be smaller than the size of the other end opening of the connecting pipe 40, so that the joint plug 41 can be inserted into the connecting pipe 40.

[0078] See also Figure 2 and Figure 6The outer periphery of the communicating pipe 40 may also be provided with a pair of fittings mounting grooves 42 to facilitate the connection between the pair of fittings and the communicating pipe 40 .

[0079] The sealing flange 50 may be located inside the box body 10 or outside the box body 10 .

[0080] See also Figure 7 In some embodiments, the sealing flange 50 is a hollow structure, so that the sealing flange 50 can be sleeved on the outer periphery of the connecting pipe 40.

[0081] The sealing flange 50 contacts both the outer surface of the communication pipe 40 and the housing 10 .

[0082] The shape of the sealing flange 50 includes but is not limited to circular, square, or hexagonal.

[0083] In some embodiments, the materials comprising the lock cover 51 include, but are not limited to, carbon steel, stainless steel, aluminum alloy, copper and copper alloy, alloy steel, and polyamide-reinforced glass fiber composite materials. For example, the lock cover 51 is made of a mixture of polyamide 66 and glass fiber reinforcement (PA66-GF) and is manufactured via an injection molding process.

[0084] The material of the lock buckle 52 and the material of the lock cover 51 can be the same or different.

[0085] In some embodiments, the lock cover 51 and the lock buckle 52 can be an integral structure or independent structures, for example, the two can be connected by welding or bonding.

[0086] In some embodiments, a plurality of lock buckles 52 may be evenly spaced along the circumference of the locking cover 51 . This allows the lock buckles 52 to be evenly stressed, thereby improving the connection and sealing effects.

[0087] In some embodiments, the shape of the lock buckle 52 can be similar to a U-shape. The lock buckle 52 can include a compression portion, and the compression portion is provided with a two-way barb structure, and the two-way barb structure is located at one end of the compression portion. When the lock buckle 52 is inserted into the connecting hole 122, the two-way barb structure first contacts the connecting hole 122, and then the connecting hole 122 squeezes the two-way barb structure, causing the compression portion to shrink inward, so that the compression portion can smoothly pass through the connecting hole 122. After the compression portion passes through the connecting hole 122, the two-way barb structure will automatically rebound to fix the lock buckle 52 at the connecting hole 122, so that the sealing flange 50 can be fixed on the box body 10, thereby realizing the self-locking function of the sealing flange 50.

[0088] In some embodiments, the number of the locking buckles 52 is equal to the number of the connecting holes 122. For example, the number of the locking buckles 52 may be 6, wherein the bidirectional inverted hook structure may include 12.

[0089] In the embodiment of the present application, the sealing flange 50 serves as a connector connecting the box body 10 and the connecting pipe 40. Its structure is simple. Multiple lock buckles 52 enable the sealing flange 50 to be connected to the first connecting port 121 without the need for other fasteners. That is, the self-locking function can be achieved through the structure of multiple lock buckles 52. The operation is simple and convenient and can reduce the number of parts in the assembly process of the battery 1001, thereby improving the assembly convenience of the battery 1001.

[0090] In related art, the sealing flange 50 can be a flange. As a connector, a variety of flange types are required depending on the application scenario, resulting in poor component versatility. However, in the embodiments of the present application, the sealing flange 50 can replace the flange, and multiple sealing flanges 50 with different diameters can be developed based on the size of the counterpart, making it a standardized part, improving component versatility and achieving technical cost reduction.

[0091] Figure 8 This is a schematic diagram of the exploded structure of the sealing flange of some embodiments of the present application, see Figure 7 and Figure 8 According to some embodiments of the present application, the locking cover 51 has a first mounting groove 56 on one side surface facing the box body 10, and the opening of the first mounting groove 56 faces the box body 10. The sealing flange 50 also includes a sealing core 55, which is located in the first mounting groove 56. The connecting pipe 40 passes through the sealing core 55, and a plurality of locking buckles 52 are spaced around the sealing core 55.

[0092] In some embodiments, a surface of one side of the locking cover 51 facing the box body 10 is recessed in a direction away from the box body 10 to form a first mounting groove 56 . The first mounting groove 56 may be located in the middle of the locking cover 51 .

[0093] In some embodiments, the shape of the first mounting groove 56 includes but is not limited to a ring, a square, a pentagon or other irregular shapes.

[0094] The sealing core 55 may be disposed around the circumference of the communication pipe 40 .

[0095] The materials of the sealing core 55 include, but are not limited to, nitrile rubber, fluororubber, silicone rubber, ethylene propylene rubber, chloroprene rubber, polytetrafluoroethylene, nylon, polyurethane, silicone, resin, etc. The sealing core 55 can be manufactured by a molding process.

[0096] Exemplarily, the constituent material of the sealing core 55 can be hard silicone rubber, and the material of the connecting pipe 40 and the box body 10 can be metal, so that a metal vulcanization process can be used to achieve a firm bond between the hard silicone rubber and the metal, so that the sealing core 55 can also fill the gap between the first connecting port 121 and the connecting pipe 40.

[0097] In some embodiments, hard silicone rubber may be attached to the surface of the box body 10 and then vulcanized under heating and pressurizing conditions to achieve adhesion between the box body 10 and the hard silicone rubber and achieve a sealing effect.

[0098] In other embodiments, a layer of adhesive may be applied to the surface of the box 10 to adhere the hard silicone rubber to the surface of the box 10, and then the hard silicone rubber may be vulcanized to achieve adhesion and a sealing effect.

[0099] In the embodiment of the present application, by providing the sealing core 55 , the sealing effect of the sealing flange 50 on the first communication port 121 can be improved, which is beneficial to maintaining the airtightness inside the box 10 and improving the service life of the battery 1001 .

[0100] According to some embodiments of the present application, the surface of the sealing core 55 surrounding the connecting pipe 40 has an annular second mounting groove 551, and the sealing flange 50 also includes a first sealing ring 53, which is located in the second mounting groove 551 and surrounds the connecting pipe 40.

[0101] The second mounting groove 551 is located on a surface of the sealing core 55 facing the communicating pipe 40 .

[0102] The first sealing ring 53 may be made of materials including, but not limited to, nitrile rubber, fluororubber, silicone rubber, ethylene propylene rubber, chloroprene rubber, polytetrafluoroethylene, nylon, polyurethane, silicone, resin, etc. For example, the first sealing ring 53 is made of ethylene propylene rubber. The first sealing ring 53 may be manufactured by a molding process.

[0103] The shape of the first sealing ring 53 matches the shape of the second mounting groove 551 .

[0104] In an embodiment of the present application, the first sealing ring 53 can enhance the sealing between the sealing core 55 and the connecting pipe 40 to improve the sealing between the sealing flange 50 and the connecting pipe 40, thereby enhancing the sealing effect of the sealing flange 50 on the first connecting port 121, which is beneficial to maintaining the airtightness inside the box body 10.

[0105] According to some embodiments of the present application, the lock buckle 52 includes a first elastic arm 521 and a second elastic arm 522, and one end of the first elastic arm 521 and one end of the second elastic arm 522 are both connected to the surface of the lock cover 51 facing the box body 10; wherein, the other end of the first elastic arm 521 and the other end of the second elastic arm 522 are spaced apart from each other, and the other end of the first elastic arm 521 has a first protrusion 5211, and the other end of the second elastic arm 522 has a second protrusion 5221, the first protrusion 5211 is located on the side of the first elastic arm 521 away from the second elastic arm 522, and the second protrusion 5221 is located on the side of the second elastic arm 522 away from the first elastic arm 521, and the first protrusion 5211 and the second protrusion 5221 pass through the connecting hole 122 and abut against the box body 10.

[0106] In some embodiments, one end of the first elastic arm 521 and one end of the second elastic arm 522 may be directly connected or indirectly connected through the locking cover 51 .

[0107] In some embodiments, the first elastic arm 521 and the second elastic arm 522 may be an integral structure or an independent structure. For example, the two may be connected by welding or bonding.

[0108] The present application does not limit the shape and size of the first elastic arm 521 and the shape and size of the second elastic arm 522. For example, the first elastic arm 521 and the second elastic arm 522 can be symmetrically arranged.

[0109] The present application does not limit the shape and size of the first protrusion 5211 and the shape and size of the second protrusion 5221. For example, the first protrusion 5211 and the second protrusion 5221 can be symmetrically arranged.

[0110] In the embodiment of the present application, the first elastic arm 521 and the second elastic arm 522 enable the lock buckle 52 to move closer to each other under the action of squeezing when passing through the connecting hole 122 and automatically rebound after passing through the connecting hole 122, thereby facilitating the installation and connection of the sealing flange 50 and the box body 10, and through the first protrusion 5211 and the second protrusion 5221, the sealing flange 50 can be fixed at the connecting hole 122, reducing the risk of the sealing flange 50 falling from the connecting hole 122, maintaining the stability of the connection between the connecting pipe 40 and the box body 10, and improving the reliability of the battery 1001.

[0111] According to some embodiments of the present application, the arrangement direction of the first elastic arm 521 and the second elastic arm 522 is a first direction, and the first elastic arm 521 and the second elastic arm 522 satisfy at least one of the following conditions: the first protrusion 5211 has a side surface away from the second elastic arm 522 as a first guide surface 5211a, and the first guide surface 5211a makes the size of the first protrusion 5211 gradually increase along the first direction from the other end of the first elastic arm 521 to one end of the first elastic arm 521; the second protrusion 5221 has a side surface away from the first elastic arm 521 as a second guide surface 5221a, and the second guide surface 5221a makes the size of the second protrusion 5221 gradually increase along the first direction from the other end of the second elastic arm 522 to one end of the second elastic arm 522.

[0112] In some embodiments, the first protrusion 5211 has a side surface away from the second elastic arm 522 as a first guide surface 5211a; or, the second protrusion 5221 has a side surface away from the first elastic arm 521 as a second guide surface 5221a; or, the first protrusion 5211 has a side surface away from the second elastic arm 522 as a first guide surface 5211a, and the second protrusion 5221 has a side surface away from the first elastic arm 521 as a second guide surface 5221a.

[0113] The first guide surface 5211 a and the second guide surface 5221 a may be the same or different.

[0114] In the embodiment of the present application, the first guide surface 5211 a and the second guide surface 5221 a enable the lock buckle 52 to pass through the connecting hole 122 quickly and smoothly, thereby improving the assembly efficiency of the sealing flange 50 and the box body 10 .

[0115] According to some embodiments of the present application, the locking cover 51 has a third annular mounting groove 511 on one side surface facing the box body 10, and the third mounting groove 511 surrounds multiple locking buckles 52. The sealing flange 50 also includes a second sealing ring 54, and the second sealing ring 54 is located in the third mounting groove 511.

[0116] The material of the second sealing ring 54 includes, but is not limited to, nitrile rubber, fluororubber, silicone rubber, ethylene propylene rubber, chloroprene rubber, polytetrafluoroethylene, nylon, polyurethane, silicone, resin, etc. For example, the material of the second sealing ring 54 is ethylene propylene rubber. The second sealing ring 54 can be manufactured by a molding process.

[0117] The shape of the second sealing ring 54 matches the shape of the third mounting groove 511 .

[0118] In an embodiment of the present application, the steps of assembling the sealing flange 50 and the box body 10 may include:

[0119] (1) Assemble the lock cover 51, the sealing core 55, the first sealing ring 53, and the second sealing ring 54 into one piece to form the sealing flange 50;

[0120] (2) The sealing flange 50 is put on the connecting pipe 40 and pressed into the multiple connecting holes 122 of the box body 10. The multiple locking buckles 52 rebound and self-lock, and the assembly is completed.

[0121] In the embodiment of the present application, the second sealing ring 54 can enhance the sealing between the sealing flange 50 and the box body 10, thereby enhancing the sealing effect of the sealing flange 50 on the first communication port 121, which is beneficial to maintaining the airtightness inside the box body 10.

[0122] In related art, the sealing flange 50 may be a flange plate, and a sealing ring is typically provided between the flange plate and the mounting interface. However, if the mounting interface is not flat, this can easily lead to airtight leakage. In the embodiment of the present application, however, by providing the sealing flange 50 with a sealing core 55, a first sealing ring 53, and a second sealing ring 54, airtight leakage is less likely to occur even in the case of poor mounting interface flatness, thereby improving the sealing performance of the sealing flange 50. For example, the sealing flange 50 can achieve an IP68-level sealing effect.

[0123] Figure 9 This is a partial cross-sectional diagram of the assembly of the box and the connecting pipe in some embodiments of the present application. Figure 10 For a top view of the heat exchange bottom plate of some embodiments of the present application, see Figure 9 and Figure 10 According to some embodiments of the present application, the housing 10 includes a body 11 and a heat exchange bottom plate 30. The body 11 includes a bottom wall 111 and side walls 112. The bottom wall 111 and the side walls 112 form a storage space 10a. The first communication port 121 is located in at least one of the bottom wall 111 and the side walls 112. The heat exchange bottom plate 30 is located in the storage space 10a. The heat exchange bottom plate 30 is connected to the body 11 so that the storage space 10a is divided into an installation cavity 10b and a first heat exchange cavity 10c. The battery cell 20 is located in the installation cavity 10b. The first communication port 121 is connected to at least one of the installation cavity 10b and the first heat exchange cavity 10c.

[0124] In the embodiment of the present application, the body 11 is surrounded by a side wall 112 and a bottom wall 111. In some embodiments, the side wall 112 may be a hollow structure with one end open, for example, the side wall 112 may be a cylinder or a cuboid with one end open, and the bottom wall 111 covers the open end of the side wall 112. In other embodiments, Figure 2 The side wall 112 may be a hollow structure with openings at both ends, and the box body 10 may further include a top wall ( Figure 2(not shown), the top wall and the bottom wall 111 respectively cover the two open ends of the side wall 112.

[0125] In the embodiment of the present application, the bottom wall 111 may be a flat or curved plate-like structure, etc., and the embodiment of the present application does not limit this.

[0126] In some embodiments, the material of the body 11 includes, but is not limited to, non-metallic materials such as polypropylene, nylon, polyvinyl chloride, carbon fiber composite materials, and acrylonitrile-butadiene-styrene terpolymer.

[0127] In other embodiments, the material of the body 11 includes, but is not limited to, metal materials such as stainless steel, aluminum alloy, and aluminum. For example, the material of the body 11 may be AL3003, which is an aluminum-manganese alloy.

[0128] In the embodiment of the present application, the side wall 112 and the bottom wall 111 can be connected in various ways. For example, the side wall 112 and the bottom wall 111 can be connected by welding, or the side wall 112 and the bottom wall 111 can also be connected by bonding. The side wall 112 and the bottom wall 111 can also be integrally formed.

[0129] In some embodiments of the present application, the material of the side wall 112 and the material of the bottom wall 111 can be the same, for example, the material of the side wall 112 and the material of the bottom wall 111 are both metal. In other embodiments of the present application, the material of the side wall 112 and the material of the bottom wall 111 can be different.

[0130] The first communication port 121 may be located on the bottom wall 111 , or on the side wall 112 , or may be located on both the bottom wall 111 and the side wall 112 .

[0131] One side surface of the heat exchange bottom plate 30 contacts the bottom wall 111 , and the other side surface contacts the battery cell 20 .

[0132] The surface of the heat exchange bottom plate 30 facing the battery cells 20 can be flat or uneven. The thickness of different parts of the heat exchange bottom plate 30 can be equal or different.

[0133] In some embodiments, the heat exchange bottom plate 30 is made of materials including, but not limited to, stainless steel, aluminum alloy, aluminum, and other metal materials. For example, the heat exchange bottom plate 30 may be made of AL3003.

[0134] The heat exchange base plate 30 can be a flat plate. During processing, the heat exchange base plate 30 can be produced through a non-deformation process. After processing, the heat exchange base plate 30 is free of residual stress. A non-deformation process means that the material undergoes no macroscopic or microscopic deformation through process control. Residual stress-free means that no invisible stress remains within the material after processing.

[0135] In some embodiments, the heat exchange base plate 30 and the body 11 are connected by bonding, welding, or bolting. For example, the heat exchange base plate 30 and the body 11 can be connected by brazing. The heat exchange base plate 30 can be connected to the bottom wall 111 of the body 11, or the heat exchange base plate 30 can be connected to both the bottom wall 111 and the side wall 112 of the body 11.

[0136] In some embodiments, one side surface of the bottom wall 111 close to the accommodating space 10a is recessed in a direction away from the battery cell 20 to form a groove, and the heat exchange bottom plate 30 at least covers the opening of the groove, thereby forming a first heat exchange cavity 10c between the bottom wall 111 and the heat exchange bottom plate 30.

[0137] In some embodiments, the heat exchange base plate 30 may be a water-cooled plate.

[0138] The embodiment of the present application does not limit the shape of the first heat exchange chamber 10c. For example, it can be a strip shape, a serpentine shape, or other irregular shapes.

[0139] In some embodiments, the first communication port 121 is in communication with the installation cavity 10b; or, the first communication port 121 is in communication with the first heat exchange cavity 10c; or, the first communication port 121 is in communication with both the installation cavity 10b and the first heat exchange cavity 10c.

[0140] In the embodiments of the present application, the heat exchange base plate 30 can exchange heat with the battery cells 20 and regulate the temperature of the battery cells 20. For example, when the temperature of the battery cells 20 is high, a lower-temperature heat exchange medium is injected into the first heat exchange cavity 10c. The heat exchange medium absorbs heat from the battery cells 20 through the heat exchange base plate 30, lowering the temperature of the battery cells 20. When the temperature of the battery cells 20 is low, a higher-temperature heat exchange medium is injected into the first heat exchange cavity 10c. The heat exchange medium transfers heat to the battery cells 20 through the heat exchange base plate 30, thereby raising the temperature of the battery cells 20. The heat exchange base plate 30 allows the battery cells 20 to operate at an appropriate temperature, improving the stability of the battery 1001.

[0141] In the embodiment of the present application, by providing the heat exchange bottom plate 30 , the first heat exchange cavity 10 c can be used to exchange heat for the battery cell 20 , so that the battery cell 20 can operate at a suitable temperature, thereby improving the temperature stability of the battery cell 20 .

[0142] See also Figure 9According to some embodiments of the present application, the first communicating port 121 is located on the side wall 112, and the first communicating port 121 is connected to the installation cavity 10b. The heat exchange bottom plate 30 has a second communicating port 31, and the second communicating port 31 is connected to the installation cavity 10b and the first heat exchange cavity 10c. The other end of the communicating pipe 40 passes through the first communicating port 121 and the second communicating port 31 in sequence and is connected to the first heat exchange cavity 10c.

[0143] The second communication port 31 passes through the heat exchange bottom plate 30 .

[0144] In some embodiments, the second communication port 31 may be formed on the heat exchange bottom plate 30 by laser cutting, blanking, or the like.

[0145] In some embodiments, the shape of the second communication port 31 includes but is not limited to a circle, a square, or a triangle.

[0146] The penetration direction of the second connecting port 31 intersects with the surface of the heat exchange bottom plate 30. For example, the penetration direction of the second connecting port 31 is perpendicular to the surface of the heat exchange bottom plate 30, that is, the second connecting port 31 penetrates the heat exchange bottom plate 30 along the thickness direction of the heat exchange bottom plate 30.

[0147] Along the penetrating direction of the second communicating opening 31 , the aperture of the second communicating opening 31 may be uniform everywhere, or may not be completely uniform.

[0148] In some embodiments, the second communication port 31 may be located at an edge of the heat exchange bottom plate 30 .

[0149] The number of the second communication openings 31 may be one, two, or more.

[0150] The other end of the communication pipe 40 may be in contact with the second communication port 31 .

[0151] In some embodiments, a local extrusion process can be used to provide a protrusion 43 at the other end opening of the connecting pipe 40. The protrusion 43 is arranged circumferentially around the second connecting port 31 to form a flange surface, so that the flange surface can cover the second connecting port 31, reducing the risk of the heat exchange medium overflowing or leaking from the second connecting port 31.

[0152] The communicating pipe 40 and the second communicating port 31 can be connected by welding, bonding or bolting.

[0153] In the embodiment of the present application, while maintaining the box body 10 in a closed state, the heat exchange medium in the first heat exchange chamber 10c can be replenished or adjusted at any time through the connecting pipe 40. The operation is simple and quick, and the reliability and temperature stability of the battery cell 20 are improved.

[0154] Figure 11 for Figure 10A partial enlarged view of the middle C part, see Figure 10 and Figure 11 According to some embodiments of the present application, a surface on one side of the heat exchange base plate 30 facing the installation cavity 10b has a positioning protrusion 32. Along the penetrating direction of the first connecting port 121, the positioning protrusion 32 is located between the second connecting port 31 and the first connecting port 121, and the other end of the connecting pipe 40 is against the positioning protrusion 32.

[0155] That is, the positioning protrusion 32 protrudes from one side surface of the heat exchange bottom plate 30 .

[0156] The positioning protrusion 32 may or may not contact the opening edge of the second communication port 31 .

[0157] refer to Figure 9 The positioning protrusion 32 is fitted with the outer surface of the communication pipe 40. For example, the positioning protrusion 32 is fitted with the protrusion 43 to position the communication pipe 40. The shape of the positioning protrusion 32 can be consistent with the cross-sectional shape of the communication pipe 40. For example, when the cross-sectional shape of the communication pipe 40 is circular, the shape of the positioning protrusion 32 can be a semicircular arc.

[0158] In some embodiments, the positioning protrusions 32 may be formed on the surface of the heat exchange bottom plate 30 by a spot welding process.

[0159] In the embodiment of the present application, by setting the positioning protrusion 32, when the connecting pipe 40 is set at the second connecting port 31, the connecting pipe 40 can press against the positioning protrusion 32, thereby fixing the position of the connecting pipe 40 at the second connecting port 31, making it easier to connect the connecting pipe 40 and the heat exchange base plate 30.

[0160] Figure 12 This is one of the partial structural diagrams of batteries in some embodiments of the present application, see Figure 2 and Figure 12 According to some embodiments of the present application, the battery 1001 also includes a heat exchange side plate 60, which is located in the installation cavity 10b. The heat exchange side plate 60 is located on at least one side of the battery cell 20. The heat exchange side plate 60 is connected to the heat exchange bottom plate 30. The heat exchange side plate 60 has a second heat exchange cavity, which is connected to the first heat exchange cavity 10c.

[0161] The heat exchange side plate 60 may be perpendicular to the heat exchange bottom plate 30. The heat exchange side plate 60 may be located on one side of the battery cell 20, on both sides of the battery cell 20, or on three sides or around the battery cell 20. For example, the heat exchange side plate 60 may be located on two opposite sides of the battery cell 20.

[0162] In some embodiments, the heat exchange side plates 60 may be spaced apart along the length or width direction of the housing 10. In some embodiments, the number of the heat exchange side plates 60 may be five, and the five heat exchange side plates 60 may be spaced apart along the width direction of the housing 10.

[0163] The connection methods of the heat exchange side plate 60 and the heat exchange bottom plate 30 include, but are not limited to, welding connection, adhesive connection, riveting connection, snap connection or bolt connection.

[0164] It is understood that the heat exchange side plate 60 has a cavity inside, thereby forming a second heat exchange cavity. The number of second heat exchange cavities can be multiple, and the multiple second heat exchange cavities are spaced apart along the width direction of the heat exchange side plate 60. Exemplarily, the number of second heat exchange cavities is 8.

[0165] The battery 1001 may further include a first current collector 70 , which is located on a surface of the heat exchange base plate 30 close to the battery cell 20 . The first heat exchange cavity 10c is connected to the first current collector 70 , and the first current collector 70 is connected to the second heat exchange cavity.

[0166] In some embodiments, the connection method between the first current collector 70 and the heat exchange bottom plate 30 includes but is not limited to welding connection, adhesive connection or bolt connection, etc. For example, the first current collector 70 and the heat exchange bottom plate 30 are connected by welding.

[0167] In some embodiments, the connection method between the first current collector 70 and the heat exchange side plate 60 includes but is not limited to welding connection, adhesive connection or plug connection.

[0168] The present embodiment does not limit the composition material and shape of the first current collector 70. For example, the material of the first current collector 70 can be AL3003, which can be manufactured by aluminum extrusion process, and the cross-sectional shape of the first current collector 70 can be rectangular.

[0169] In the embodiment of the present application, by providing a heat exchange bottom plate 30 and a heat exchange side plate 60 , the first heat exchange cavity 10c and the second heat exchange cavity can be used simultaneously to exchange heat on different surfaces of the battery cell 20 , thereby improving the heat exchange efficiency of the battery cell 20 .

[0170] See also Figure 2 According to some embodiments of the present application, the battery cell 20 has two opposite first surfaces, two opposite second surfaces, and two opposite third surfaces, the area of ​​the first surface is greater than the area of ​​the second surface, and the area of ​​the first surface is greater than the area of ​​the third surface. The heat exchange bottom plate 30 is in contact with one of the second surface and the third surface, and the heat exchange side plate 60 is in contact with the other of the second surface and the third surface.

[0171] The first surface is perpendicular to the heat exchange bottom plate 30 .

[0172] When the heat exchange bottom plate 30 is in contact with the second surface, the heat exchange side plate 60 is in contact with the third surface; when the heat exchange bottom plate 30 is in contact with the third surface, the heat exchange side plate 60 is in contact with the second surface.

[0173] The battery cell 20 may be square in shape.

[0174] In the embodiment of the present application, when the battery cell 20 reaches a certain life cycle during the cyclic charge and discharge process, gas production will occur inside the battery cell 20, causing the surface of the battery cell 20 to expand. Compared with the second and third sides of the battery cell 20, the first side of the battery cell 20 is the position with the largest expansion and there is a large stress. The heat exchange bottom plate 30 and the heat exchange side plate 60 are arranged to contact the second and third sides of the battery cell 20. Even if the battery cell 20 expands, it is not easy to damage the heat exchange bottom plate 30 and the heat exchange side plate 60, reducing the risk of deformation or damage of the heat exchange bottom plate 30 and the heat exchange side plate 60 due to the expansion force, thereby reducing the impact on the heat exchange effect of the battery cell 20 and improving the reliability of the battery 1001.

[0175] In related art, heat is exchanged from the sides of battery cells 20 using harmonica tube plates. This occupies a relatively large volume of the accommodation space 10a, resulting in a low energy density of battery 1001. However, in the present embodiment, the inherent gaps between each group of battery cells 20 are utilized, and heat exchange side plates 60 are positioned in these gaps to exchange heat from the sides of the battery cells 20. This eliminates the need for the heat exchange side plates 60 to occupy excessive space, thereby improving the overall energy density of battery 1001.

[0176] Figure 13 This is a schematic structural diagram of the heat exchange side plate in some embodiments of the present application. Figure 14 This is the second structural diagram of the battery of some embodiments of the present application, see Figure 13 and Figure 14 According to some embodiments of the present application, the surface of the heat exchange side plate 60 close to the battery cell 20 has a heat conductive layer 61 .

[0177] The constituent materials of the heat conducting layer 61 include but are not limited to silicone rubber, polyurethane, acrylic, epoxy resin, graphene, etc.

[0178] The heat-conducting layer 61 may be connected to the surface of the heat-exchange side plate 60 by bonding.

[0179] See also Figure 14In some embodiments, the battery 1001 further includes a bottom guard plate 80, which is located on a side of the housing 10 away from the battery cells 20 and is connected to the housing 10. Because the bottom guard plate 80 has a certain mechanical strength, rigidity, and corrosion resistance, it can provide some protection for the housing 10, reducing the possibility of damage to the housing 10 caused by external forces and corrosion of the bottom wall 111, thereby improving the reliability of the battery 1001.

[0180] In some embodiments, the battery 1001 further includes a buffer layer 90, which is located between the housing 10 and the bottom guard plate 80. The buffer layer 90 has excellent shock resistance, pressure resistance, and buffering properties, so that the buffer layer 90 can absorb some external forces, reduce the impact of external forces on the housing 10, and improve the reliability of the battery 1001.

[0181] In the embodiment of the present application, the heat-conducting layer 61 is conducive to making the distance between the heat-exchange side plate 60 and the battery cell 20 closer or closer, facilitating heat exchange between the battery cell 20 and the heat-exchange side plate 60, and improving the heat exchange efficiency and heat exchange effect. At the same time, the heat-conducting layer 61 can also have a certain buffering capacity, which can absorb part of the expansion of the battery cell 20, reduce the squeezing effect of the expansion on the second heat exchange cavity in the heat-exchange side plate 60, maintain the heat exchange effect of the heat-exchange side plate 60 on the battery cell 20 relatively stable, and improve the reliability of the battery 1001.

[0182] An embodiment of the present application provides an electrical device, which includes the battery 1001 in the above embodiment, and the battery 1001 is used to provide electrical energy.

[0183] The electrical device has the beneficial effects of the battery 1001 provided in the embodiments of the present application. For details, please refer to the specific description of the battery 1001 in the above embodiments, which will not be repeated here.

[0184] An embodiment of the present application provides an energy storage device, which includes the battery 1001 in the above embodiment, and the battery 1001 is used to store electrical energy.

[0185] The energy storage device has the beneficial effects of the battery 1001 provided in the embodiments of the present application. For details, please refer to the specific description of the battery 1001 in the above embodiments, which will not be repeated here.

[0186] The present embodiment provides a battery 1001, comprising a housing 10, a battery cell 20, a communication pipe 40, and a sealing flange 50. The housing 10 has a storage space 10a, a first communication port 121, and a plurality of connection holes 122. The first communication port 121 communicates with the storage space 10a, and the plurality of connection holes 122 are spaced around the first communication port 121. The battery cell 20 is located within the storage space 10a. One end of the communication pipe 40 is located outside the storage space 10a, and the other end of the communication pipe 40 passes through the first communication port 121 and communicates with the storage space 10a. The sealing flange 50 includes a locking cover 51 and a plurality of locking buckles 52. The locking cover 51 is attached to the housing 10, and the communication pipe 40 passes through the locking cover 51. The plurality of locking buckles 52 correspond one-to-one with the plurality of connection holes 122. The plurality of locking buckles 52 are spaced around the communication pipe 40. One end of the locking buckle 52 is connected to the surface of the locking cover 51 facing the housing 10, and the other end of the locking buckle 52 passes through the connection hole 122 and is connected to the housing 10.

[0187] The locking cover 51 has a first mounting groove 56 on one side surface facing the box body 10, and the opening of the first mounting groove 56 faces the box body 10. The sealing flange 50 also includes a sealing core 55, which is located in the first mounting groove 56. The connecting pipe 40 passes through the sealing core 55, and multiple locking buckles 52 are spaced around the sealing core 55.

[0188] The surface of the sealing core 55 surrounding the communicating pipe 40 has an annular second mounting groove 551 . The sealing flange 50 further includes a first sealing ring 53 located in the second mounting groove 551 and surrounding the communicating pipe 40 .

[0189] The lock buckle 52 includes a first elastic arm 521 and a second elastic arm 522, one end of the first elastic arm 521 and one end of the second elastic arm 522 are both connected to the surface of the lock cover 51 facing the box body 10; wherein, the other end of the first elastic arm 521 and the other end of the second elastic arm 522 are spaced apart from each other, the other end of the first elastic arm 521 has a first protrusion 5211, and the other end of the second elastic arm 522 has a second protrusion 5221, the first protrusion 5211 is located on the side of the first elastic arm 521 away from the second elastic arm 522, and the second protrusion 5221 is located on the side of the second elastic arm 522 away from the first elastic arm 521, the first protrusion 5211 and the second protrusion 5221 pass through the connecting hole 122 and abut against the box body 10.

[0190] The arrangement direction of the first elastic arm 521 and the second elastic arm 522 is the first direction, and the first elastic arm 521 and the second elastic arm 522 satisfy at least one of the following conditions: the first protrusion 5211 has a side surface away from the second elastic arm 522 as a first guide surface 5211a, and the first guide surface 5211a makes the size of the first protrusion 5211 gradually increase along the first direction from the other end of the first elastic arm 521 to one end of the first elastic arm 521; the second protrusion 5221 has a side surface away from the first elastic arm 521 as a second guide surface 5221a, and the second guide surface 5221a makes the size of the second protrusion 5221 gradually increase along the first direction from the other end of the second elastic arm 522 to one end of the second elastic arm 522.

[0191] The locking cover 51 has a third annular mounting groove 511 on one side of the housing 10 . The third mounting groove surrounds a plurality of locking buckles 52 . The sealing flange 50 further includes a second sealing ring 54 . The second sealing ring 54 is located in the third mounting groove 511 .

[0192] The housing 10 includes a main body 11 and a heat exchange base plate 30. The main body 11 includes a bottom wall 111 and side walls 112, which define a storage space 10a. A first communication port 121 is located in at least one of the bottom wall 111 and the side walls 112. The heat exchange base plate 30 is located within the storage space 10a and is connected to the main body 11, dividing the storage space 10a into a mounting cavity 10b and a first heat exchange cavity 10c. The battery cell 20 is located in the mounting cavity 10b, and the first communication port 121 communicates with at least one of the mounting cavity 10b and the first heat exchange cavity 10c.

[0193] The first communicating port 121 is located on the side wall 112 and is connected to the installation cavity 10b. The heat exchange bottom plate 30 has a second communicating port 31, which is connected to the installation cavity 10b and the first heat exchange cavity 10c. The other end of the communicating pipe 40 passes through the first communicating port 121 and the second communicating port 31 in sequence and is connected to the first heat exchange cavity 10c.

[0194] The heat exchange base plate 30 has a positioning protrusion 32 on one side surface facing the installation cavity 10b. Along the penetrating direction of the first connecting port 121, the positioning protrusion 32 is located between the second connecting port 31 and the first connecting port 121, and the other end of the connecting pipe 40 is against the positioning protrusion 32.

[0195] The battery 1001 also includes a heat exchange side plate 60, which is located in the installation cavity 10b. The heat exchange side plate 60 is located on at least one side of the battery cell 20. The heat exchange side plate 60 is connected to the heat exchange bottom plate 30. The heat exchange side plate 60 has a second heat exchange cavity, and the second heat exchange cavity is connected to the first heat exchange cavity 10c.

[0196] The battery cell 20 has two opposing first surfaces, two opposing second surfaces, and two opposing third surfaces. The area of ​​the first surface is larger than that of the second surface, which in turn is larger than that of the third surface. The heat exchange bottom plate 30 is bonded to one of the second and third surfaces, and the heat exchange side plate 60 is bonded to the other of the second and third surfaces. The surface of the heat exchange side plate 60 closest to the battery cell 20 has a heat conductive layer 61.

[0197] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: The battery comprises: The box body has a storage space, a first communication port and a plurality of connection holes, wherein the first communication port is connected to the storage space, and the plurality of connection holes are spaced around the first communication port; A battery cell is located in the accommodation space; a communication pipe, one end of which is located outside the accommodating space, and the other end of which passes through the first communication port and is in communication with the accommodating space; The sealing flange includes a locking cover and multiple locking buckles. The locking cover is fitted with the box body, the communicating pipe passes through the locking cover, the multiple locking buckles correspond to the multiple connecting holes one by one, and the multiple locking buckles surround the communicating pipe at intervals. One end of the locking buckle is connected to the side surface of the locking cover facing the box body, and the other end of the locking buckle passes through the connecting hole and is connected to the box body.

2. The battery according to claim 1, characterized in that The locking cover has a first mounting groove, the opening of the first mounting groove faces the box body, and the sealing flange further includes: The sealing core is located in the first installation groove, the communicating pipe passes through the sealing core, and a plurality of locking buckles surround the sealing core at intervals.

3. The battery according to claim 2, characterized in that The surface of the sealing core surrounding the communicating pipe has an annular second mounting groove, and the sealing flange further comprises: The first sealing ring is located in the second installation groove, and the first sealing ring surrounds the communicating pipe.

4. The battery according to any one of claims 1 to 3, characterized in that The lock comprises: a first elastic arm, one end of the first elastic arm being connected to a surface of the lock cover facing the box body; a second elastic arm, one end of the second elastic arm being connected to a surface of the lock cover facing the box body; The other end of the first elastic arm and the other end of the second elastic arm are spaced apart from each other, the other end of the first elastic arm has a first protrusion, and the other end of the second elastic arm has a second protrusion, the first protrusion is located on the side of the first elastic arm away from the second elastic arm, and the second protrusion is located on the side of the second elastic arm away from the first elastic arm, and the first protrusion and the second protrusion pass through the connecting hole and abut against the box body.

5. The battery according to claim 4, characterized in that The arrangement direction of the first elastic arm and the second elastic arm is a first direction, and the first elastic arm and the second elastic arm meet at least one of the following conditions: The first protrusion has a first guide surface on one side away from the second elastic arm, and the first guide surface makes the size of the first protrusion gradually increase along the first direction from the other end of the first elastic arm to the one end of the first elastic arm; The second protrusion has a side surface away from the first elastic arm as a second guide surface, and the second guide surface makes the size of the second protrusion gradually increase along the first direction from the other end of the second elastic arm to the one end of the second elastic arm.

6. The battery according to any one of claims 1 to 3, characterized in that The lock cover has a third annular mounting groove on one side of the surface facing the box body, and the third mounting groove surrounds the plurality of lock buckles. The sealing flange also includes: The second sealing ring is located in the third installation groove.

7. The battery according to any one of claims 1 to 3, characterized in that The box includes: a body comprising a bottom wall and side walls, wherein the bottom wall and the side walls form the accommodation space, and the first communication port is located at at least one of the bottom wall and the side walls; A heat exchange base plate is located in the accommodating space and is connected to the main body so that the accommodating space is divided into an installation cavity and a first heat exchange cavity. The battery cell is located in the installation cavity, and the first communication port is connected to at least one of the installation cavity and the first heat exchange cavity.

8. The battery according to claim 7, characterized in that The first communication port is located on the side wall and communicates with the installation cavity. The heat exchange bottom plate has a second communication port, and the second communication port communicates with the installation cavity and the first heat exchange cavity. The other end of the communication pipe passes through the first communication port and the second communication port in sequence and is communicated with the first heat exchange chamber.

9. The battery according to claim 8, characterized in that A surface of the heat exchange base plate facing the installation cavity has a positioning protrusion. Along the penetrating direction of the first communicating port, the positioning protrusion is located between the second communicating port and the first communicating port, and the other end of the communicating pipe abuts against the positioning protrusion.

10. The battery according to claim 7, characterized in that The battery further comprises: A heat exchange side plate is located in the installation cavity, the heat exchange side plate is located on at least one side of the battery cell, the heat exchange side plate is connected to the heat exchange bottom plate, and the heat exchange side plate has a second heat exchange cavity, which is connected to the first heat exchange cavity.

11. The battery according to claim 10, characterized in that The battery cell has two opposing first surfaces, two opposing second surfaces, and two opposing third surfaces. The area of ​​the first surface is greater than the area of ​​the second surface, and the area of ​​the first surface is greater than the area of ​​the third surface. The heat exchange bottom plate is in contact with one of the second surface and the third surface, and the heat exchange side plate is in contact with the other of the second surface and the third surface.

12. The battery according to claim 10, characterized in that The surface of the heat exchange side plate close to the battery cell has a heat conductive layer.

13. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 1 to 12, and the battery is used to provide electrical energy.

14. An energy storage device, characterized in that: The energy storage device comprises the battery according to any one of claims 1 to 12, wherein the battery is used to store electrical energy.

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