Batteries, electrical devices and energy storage devices

Abstract

The present application provides a battery, an electrical device and an energy storage device, which belongs to the field of battery technology. The battery includes a housing, a battery cell, a heat exchange bottom plate and a connecting pipe. The housing has a storage space, the battery cell is located in the storage space, and the heat exchange bottom plate is connected to the housing. The bottom wall of the housing has a groove on one side surface close to the storage space, the heat exchange bottom plate is located between the bottom wall and the battery cell, and the heat exchange bottom plate at least covers the opening of the groove, so that a first heat exchange flow channel is formed between the bottom wall and the heat exchange bottom plate. The heat exchange bottom plate has a first heat exchange port, the side wall of the housing has a second heat exchange port, and the connecting pipe connects the first heat exchange port and the second heat exchange port. The end of the connecting pipe connected to the first heat exchange port has a protrusion, and the side surface of the heat exchange bottom plate facing the storage space has a positioning protrusion, and the protrusion is offset against the positioning protrusion. The battery provided by the present application can improve the heat exchange efficiency of the battery while improving the installation efficiency of the battery.

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] Batteries typically consist of a housing, battery cells, and a heat exchanger, all of which are located within the housing. The heat exchanger regulates the temperature of the battery cells, ensuring they operate at a suitable temperature and improving the battery's thermal stability. In some cases, poor assembly efficiency of the heat exchanger affects battery installation efficiency, while poor flatness of the mounting surface between the heat exchanger and the battery cells can also affect the battery's heat transfer efficiency. Summary of the Invention

[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 heat exchange efficiency and installation efficiency of the battery.

[0005] An embodiment of the first aspect of the present application provides a battery, comprising a housing, a battery cell, and a heat exchange base. The housing has a storage space, the battery cell is located in the storage space, and the heat exchange base is connected to the housing. A groove is formed on a side surface of the bottom wall of the housing near the storage space, the heat exchange base is located between the bottom wall and the battery cell, and the heat exchange base at least covers the opening of the groove, so that a first heat exchange flow channel is formed between the bottom wall and the heat exchange base. The heat exchange base has a first heat exchange port, which passes through the heat exchange base and is connected to the first heat exchange flow channel. The side wall of the housing has a second heat exchange port, which passes through the side wall; a connecting pipe, which connects the first heat exchange port and the second heat exchange port; an end of the connecting pipe connected to the first heat exchange port has a protrusion, which surrounds the outer wall of the connecting pipe; a positioning protrusion is formed on a side surface of the heat exchange base facing the storage space, and at least a portion of the positioning protrusion is located between the first heat exchange port and the second heat exchange port along the direction of penetration of the second heat exchange port, and the protrusion abuts against the positioning protrusion.

[0006] In the technical solution of the embodiment of the present application, since the heat exchange base plate is a flat plate structure, even if the groove has some process defects, the flatness of the assembly surface between the heat exchange base plate and the battery cell can be improved, the contact area between the heat exchange base plate and the battery cell is larger, and the heat exchange base plate can evenly exchange the heat of the battery cell with the heat of the heat exchange medium in the first heat exchange flow channel, thereby improving the heat exchange efficiency of the battery. By providing a positioning protrusion, when a connecting pipe is installed at the first heat exchange port, the protrusion of the connecting pipe can abut against the positioning protrusion, thereby fixing the connecting pipe in the first heat exchange port, facilitating the connection of the connecting pipe and the heat exchange base plate, improving the efficiency of assembling the connecting pipe, and thus improving the installation efficiency of the battery.

[0007] In some embodiments, the side wall further comprises a plurality of connection holes, which are spaced apart and surround the second heat exchange port. The battery further comprises a sealing flange, which comprises a locking cover, a plurality of locking buckles, a first sealing ring, and a second sealing ring. The locking cover surrounds the second heat exchange port and is in contact with the side surface of the side wall facing away from the storage space, with the connecting pipe passing through the locking cover; the plurality of locking buckles are spaced apart and surround the second heat exchange port, and the plurality of locking buckles correspond one-to-one with the plurality of connection holes, with one end of the locking buckle connected to the side surface of the locking cover facing the side wall, and the other end of the locking buckle passing through the connection hole and abutting against the side wall; the first sealing ring is located between the locking cover and the side wall, and surrounds the plurality of locking buckles. Multiple locking buckles can pass through the connecting hole and abut against the side wall, thereby fixing the relative position between the connecting pipe and the second heat exchange port. The self-locking effect of the sealing flange can be achieved through a simple pressing operation, which is convenient for installation and use, and can also reduce the risk of the sealing flange falling off from the side wall under working conditions such as vibration or impact; in addition, the first sealing ring can enhance the sealing between the sealing flange and the side wall, and the second sealing ring can improve the sealing between the sealing flange and the connecting pipe, thereby improving the sealing effect of the sealing flange on the second heat exchange port, which is beneficial to maintaining the airtightness inside the box.

[0008] In some embodiments, the locking cover has a mounting groove with an opening toward the sidewall. The sealing flange further includes a sealing core and a second sealing ring. The sealing core is positioned within the mounting groove, the connecting pipe extends through the sealing core, and the second sealing ring is positioned between the sealing core and the connecting pipe. The provision of the sealing core, the first sealing ring, and the second sealing ring improves the sealing effect of the sealing flange on the second heat exchange port, thereby maintaining airtightness within the housing and increasing the battery life.

[0009] In some embodiments, the battery further comprises a heat exchange side plate, which is positioned within the accommodation space and located 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 channel, which is connected to the first heat exchange channel. By providing the heat exchange bottom plate and the heat exchange side plate, the first heat exchange channel and the second heat exchange channel can be used simultaneously to exchange heat on different surfaces of the battery cell, thereby improving the heat exchange efficiency of the battery cell.

[0010] 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 first surface 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.

[0011] In some embodiments, the heat exchange base plate has a first heat exchange hole that communicates with a first heat exchange channel. The battery further includes a first current collector located on a side of the heat exchange base plate proximal to the battery cell. The first current collector is connected to the heat exchange base plate and covers the first heat exchange hole. The first current collector has a second heat exchange hole and a third heat exchange hole that communicate with each other. The second heat exchange hole communicates with the first heat exchange hole, and the third heat exchange hole communicates with the second heat exchange channel. The provision of the first current collector allows the heat exchange medium to accumulate in the first current collector and then be evenly transferred to the second heat exchange channel of the heat exchange side plate, thereby improving the uniformity of heat exchange between the different heat exchange side plates and the side of the battery cell, thereby enhancing heat exchange efficiency.

[0012] In some embodiments, the heat exchange side plate includes a heat exchange plate and a second fluid collector. A second heat exchange flow channel is located in the heat exchange plate, which is located on at least one side of the battery cell. The second fluid collector is located on at least one side of the heat exchange plate, and at least one end of the heat exchange plate is connected to the second fluid collector. The second fluid collector has a connecting channel, and the second heat exchange flow channel is connected to the connecting channel. The second fluid collector is connected to the first fluid collector, and the connecting channel is connected to the third heat exchange hole. This allows the heat exchange medium to accumulate in the second fluid collector and be evenly dispersed in the second heat exchange flow channel, thereby improving the uniformity of heat exchange between the heat exchange side plate and the battery cell.

[0013] In some embodiments, the second current collector has a guide groove on the side facing the heat exchange plate, a communication channel extends through the side of the guide groove, at least one end of the heat exchange plate is located within the guide groove, and the second heat exchange channel extends through the side of the heat exchange plate facing the guide groove. This facilitates insertion of the heat exchange plate into the guide groove and connection with the second current collector, improving the strength of the connection. Furthermore, the sufficiently large cross-sectional area of ​​the second heat exchange channel facilitates rapid transport of heat exchange medium accumulated in the guide groove to the second heat exchange channel, thereby improving the heat exchange efficiency of the battery cells.

[0014] In some embodiments, the bottom surface of the guide trough is provided with a limit block, and the heat exchange plate abuts against the limit block. The limit block can prevent the heat exchange plate from fully contacting the bottom surface of the guide trough, thereby forming a space for the heat exchange medium to pass between the heat exchange plate and the bottom surface of the guide trough, improving the transport efficiency of the heat exchange medium and thus improving the heat exchange efficiency of the battery cells.

[0015] In some embodiments, the first current collector has a mounting block on a side facing the second current collector, the third heat exchange hole extends through the mounting block, one end of the second current collector is located within the mounting block, and the battery further includes a third sealing ring located between the second current collector and the mounting block. The connection between the second current collector and the mounting block increases the contact area between the second current collector and the first current collector, improving the strength of the connection between the two. Furthermore, the third sealing ring enhances the sealing performance of the connection between the second current collector and the mounting block, reducing the risk of heat exchange medium overflowing or leaking from the connection.

[0016] In some embodiments, the outer wall of the second current collector has a mounting groove that surrounds the outer wall of the second current collector, is adjacent to the mounting block, and the outer wall of the mounting block has a locking groove. The battery also includes a sealing nest that is fitted over the second current collector and the mounting block, with a portion of the sealing nest located within the mounting groove. The end of the sealing nest that is distal from the mounting groove has a locking barb located within the locking groove. The sealing nest can achieve a self-locking function, which helps to fix the relative position between the second current collector and the mounting block, reduces the possibility of the second current collector shaking on the mounting block, improves the stability of the connection between the two, and simplifies the connection between the second current collector and the mounting block.

[0017] In some embodiments, the battery further includes a fourth sealing ring located within the mounting groove, surrounding the second current collector and contacting the mounting block and the sealing nest. The fourth sealing ring can improve the sealing between the sealing nest, the second current collector, and the mounting block, thereby improving the sealing effect at the connection between the mounting block and the second current collector.

[0018] In some embodiments, the heat exchange side plate further includes a heat conductive layer, located at least on the surface of the heat exchange side plate proximal to the battery cells. The heat conductive layer facilitates closer or closer contact between the heat exchange side plate and the battery cells, facilitating heat exchange between the battery cells and the heat exchange side plate, thereby improving heat exchange efficiency and effect. Furthermore, the heat conductive layer can also have a certain buffering capacity, absorbing some of the expansion of the battery cells, reducing the squeezing effect of the expansion on the second heat exchange channel in the heat exchange side plate, maintaining a relatively stable heat exchange effect between the heat exchange side plate and the battery cells, and improving battery reliability.

[0019] In some embodiments, the battery further includes a bottom guard plate located on a side of the housing away from the battery cells and connected to the housing. Because the bottom guard plate has a certain degree of mechanical strength, rigidity, and corrosion resistance, it can provide some protection for the bottom wall of the housing, reducing the possibility of damage to the first heat exchange channel due to external forces and corrosion of the bottom wall, thereby improving the reliability of the battery.

[0020] In some embodiments, the battery further includes a buffer layer located between the housing and the bottom guard plate. The buffer layer has excellent shock resistance, pressure resistance, and buffering properties, allowing the buffer layer to absorb some external forces, reducing the impact of external forces on the first heat exchange channel and improving battery reliability.

[0021] 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.

[0022] 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.

[0023] 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

[0024] 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.

[0025] Figure 1 A schematic structural diagram of a vehicle according to some embodiments of the present application;

[0026] Figure 2 This is one of the structural schematic diagrams of batteries in some embodiments of the present application;

[0027] Figure 3 This is a schematic structural diagram of a box body in some embodiments of the present application;

[0028] Figure 4 This is a schematic diagram of the exploded structure of a battery cell according to some embodiments of the present application;

[0029] Figure 5 This is a schematic structural diagram of a heat exchange base plate according to some embodiments of the present application;

[0030] Figure 6 A side view of a box provided in an embodiment of the present application;

[0031] Figure 7 for Figure 6 A partial enlarged view of part B in the middle;

[0032] Figure 8 This is a schematic structural diagram of the connecting pipes in some embodiments of the present application;

[0033] Figure 9 A top view of a heat exchange base plate according to some embodiments of the present application;

[0034] Figure 10 for Figure 9 A partial enlarged view of the middle C part;

[0035] Figure 11 This is a partial cross-sectional schematic diagram of the assembly of the box, heat exchange bottom plate and connecting pipes in some embodiments of the present application;

[0036] Figure 12 This is a schematic structural diagram of a sealing flange in some embodiments of the present application;

[0037] Figure 13 This is a schematic diagram of the exploded structure of the sealing flange in some embodiments of the present application;

[0038] Figure 14 This is one of the partial structural schematic diagrams of batteries according to some embodiments of the present application;

[0039] Figure 15 This is a second schematic diagram of a partial structure of a battery according to some embodiments of the present application;

[0040] Figure 16 This is a schematic structural diagram of the first current collector in some embodiments of the present application;

[0041] Figure 17 A bottom view of a first current collector according to some embodiments of the present application;

[0042] Figure 18 A front view of a first current collector according to some embodiments of the present application;

[0043] Figure 19 for Figure 18 A partial enlarged view of the middle E part;

[0044] Figure 20 This is a schematic structural diagram of the first current collector end cap in some embodiments of the present application;

[0045] Figure 21 This is a schematic structural diagram of a heat exchange side plate in some embodiments of the present application;

[0046] Figure 22 A schematic cross-sectional view of the assembly of a heat exchange side plate and a first current collector according to some embodiments of the present application;

[0047] Figure 23 This is a schematic diagram of the exploded structure of the heat exchange side plate and the first current collector in some embodiments of the present application;

[0048] Figure 24 A cross-sectional schematic diagram of the assembly of a heat exchange plate, a first current collector, and a second current collector according to some embodiments of the present application;

[0049] Figure 25 A side view of a second current collector according to some embodiments of the present application;

[0050] Figure 26 This is the second structural diagram of the battery of some embodiments of the present application.

[0051] Description of reference numerals:

[0052] 1000, vehicle; 1001, battery; 1002, controller; 1003, motor; 10, housing; 10a, accommodating space; 11, bottom wall; 111, groove; 12, side wall; 121, second heat exchange 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, first heat exchange port; 32, positioning protrusion; 33, first heat exchange port; 40, connecting pipe; 41, joint plugging cover; 42, handpiece mounting groove; 43, protrusion; 50, sealing flange; 51, locking cover; 52. Locking buckle; 53. First sealing ring; 54. Second sealing ring; 55. Sealing core; 56. Mounting groove; 60. Heat exchange side plate; 61. Heat exchange plate; 62. Second collector; 621. Guide groove; 6211. Limiting block; 622. Connecting channel; 623. Mounting groove; 63. Heat conductive layer; 70. First collector; 71. Second heat exchange hole; 72. Third heat exchange hole; 73. Mounting block; 731. Locking groove; 74. First collector end cover; 80. Third sealing ring; 90. Sealing nest; 91. Locking barb; 100. Fourth sealing ring; 110. Bottom guard plate; 120. Buffer layer. DETAILED DESCRIPTION

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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).

[0059] 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.

[0060] 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.

[0061] 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.

[0062] A battery typically consists of a housing, battery cells, and a heat exchanger, all of which are located within the housing. The heat exchanger regulates the temperature of the battery cells, allowing them to operate at an appropriate temperature and improving the battery's thermal stability. In related art, the heat exchanger can be a water-cooling tube. After forming a contoured groove on the bottom wall of the housing that matches the shape of the water-cooling tube, the water-cooling tube is embedded within the groove, allowing the water-cooling tube to contact and exchange heat with the battery cells.

[0063] Due to some defects in the manufacturing process of the contoured grooves and water-cooling tubes, such as uneven inner walls or varying depths in the contoured grooves, and the tendency for the water-cooling tubes to sag or warp at their bends, the flatness of the assembly surface between the water-cooling tube and the contoured groove is poor. This also results in poor flatness of the assembly surface between the water-cooling tube and the battery cell, reducing the contact area between the battery cell and the water-cooling tube, thereby affecting the heat exchange efficiency of the water-cooling tube to the battery cell. This also results in low assembly efficiency of the heat exchange component, affecting battery installation efficiency.

[0064] Based on the above considerations, the present application designs a battery comprising a housing, a battery cell, a heat exchange base, and a connecting pipe. The housing has a storage space, the battery cell is located within the storage space, and the heat exchange base is connected to the housing. The bottom wall of the housing has a groove on one side of the surface near the storage space. The heat exchange base is located between the bottom wall and the battery cell, and the heat exchange base covers at least the opening of the groove, so that a first heat exchange channel is formed between the bottom wall and the heat exchange base. The heat exchange base has a first heat exchange port, which passes through the heat exchange base and is connected to the first heat exchange channel. The side wall of the housing has a second heat exchange port, which passes through the side wall. The connecting pipe connects the first heat exchange port and the second heat exchange port. The connecting pipe has a protrusion at one end that connects to the first heat exchange port. The protrusion surrounds the outer wall of the connecting pipe. The heat exchange base has a positioning protrusion on the side of the surface facing the storage space. Along the direction of the second heat exchange port, at least a portion of the positioning protrusion is located between the first heat exchange port and the second heat exchange port, and the protrusion abuts against the positioning protrusion.

[0065] Because the heat exchange baseplate is a flat plate structure, even if the grooves have some manufacturing defects, the flatness of the assembly surface between the heat exchange baseplate and the battery cells can be improved. This increases the contact area between the heat exchange baseplate and the battery cells, allowing the heat exchange baseplate to evenly exchange heat from the battery cells with the heat exchange medium in the first heat exchange flow channel, thereby improving the heat exchange efficiency of the battery. When installing the connecting pipe at the first heat exchange port, the protrusion can abut the positioning protrusion, thereby fixing the connecting pipe in place at the first heat exchange port. This facilitates the connection of the connecting pipe to the heat exchange baseplate, improves the efficiency of the connecting pipe assembly, and therefore improves the efficiency of battery installation.

[0066] The battery disclosed in the embodiments of the present application can be used, but is not limited to, in electrical devices or energy storage devices such as vehicles, ships, or aircraft. The battery disclosed in the present application can be used to form a power supply system for the electrical device or energy storage device.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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 and a heat exchange bottom plate 30. Figure 3 This is a schematic diagram of the structure of the box of some embodiments of the present application, see Figure 2 and Figure 3 The housing 10 has a storage space 10a, in which the battery cells 20 are located. The heat exchange bottom plate 30 is connected to the housing 10. A groove 111 is formed on the side of the bottom wall 11 of the housing 10 near the storage space 10a. The heat exchange bottom plate 30 is located between the bottom wall 11 and the battery cells 20. The heat exchange bottom plate 30 at least covers the opening of the groove 111, thereby forming a first heat exchange channel between the bottom wall 11 and the heat exchange bottom plate 30.

[0073] The battery cells 20 and the heat exchange bottom plate 30 are both located in the accommodation space 10 a.

[0074] In the embodiment of the present application, the box body 10 is surrounded by a side wall 12 and a bottom wall 11. In some embodiments, the side wall 12 can be a hollow structure with one end open, for example, the side wall 12 can be a cylinder or a rectangular parallelepiped with one end open, and the bottom wall 11 covers the open end of the side wall 12. In other embodiments, refer to Figure 2 and Figure 3 The side wall 12 may be a hollow structure with openings at both ends, and the box body 10 may further include a top wall ( Figure 2 and Figure 3(not shown), the top wall and the bottom wall 11 respectively cover the two open ends of the side wall 12.

[0075] In the embodiment of the present application, the bottom wall 11 may be a flat or curved plate-like structure, etc., and the embodiment of the present application does not limit this.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] Figure 4 This is a schematic diagram of the exploded structure of the battery cell of some embodiments of the present application, see Figure 4 The battery cell 20 includes an end cap 21, an electrode terminal 21a, a housing 22, an electrode assembly 23 and other functional components.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] The side surface of the bottom wall 11 near the accommodation space 10a is recessed away from the battery cell 20. The recessed direction of the groove 111 intersects the bottom wall 11. For example, the recessed direction of the groove 111 is perpendicular to the bottom wall 11.

[0084] In some embodiments of the present application, the side surface of the bottom wall 11 away from the accommodating space 10a can be a flat surface. Due to the presence of the groove 111, the thickness of the bottom wall 11 of the box body 10 is inconsistent, that is, the thickness at the groove 111 is smaller than the thickness at other positions in the bottom wall 11.

[0085] In some other embodiments of the present application, the surface of the bottom wall 11 on one side away from the accommodating space 10 a may be a concave-convex surface.

[0086] In some embodiments, the cross-sectional shape of the groove 111 includes but is not limited to a rectangle, a semi-arc, a rounded rectangle or other irregular shapes.

[0087] In some embodiments, the number of the groove 111 can be one or more.

[0088] The embodiment of the present application does not limit the shape of the groove 111. For example, it can be a strip shape, a serpentine shape, or other irregular shapes.

[0089] In some embodiments, the components of the box body 10 include, but are not limited to, non-metallic materials such as polypropylene, nylon, polyvinyl chloride, carbon fiber composite materials, and acrylonitrile-butadiene-styrene terpolymer.

[0090] In other embodiments, the material of the housing 10 includes, but is not limited to, metal materials such as stainless steel, aluminum alloy, and aluminum. For example, the housing 10 may be made of AL3003, which is an aluminum-manganese alloy.

[0091] In the embodiment of the present application, the side wall 12 and the bottom wall 11 can be connected in various ways. For example, the side wall 12 and the bottom wall 11 can be connected by welding, or the side wall 12 and the bottom wall 11 can also be connected by bonding. The side wall 12 and the bottom wall 11 can also be integrally formed.

[0092] In some embodiments of the present application, the material of the side wall 12 and the material of the bottom wall 11 can be the same, for example, the material of the side wall 12 and the material of the bottom wall 11 are both metal. In other embodiments of the present application, the material of the side wall 12 and the material of the bottom wall 11 can be different.

[0093] 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 12 and a bottom wall 11. Subsequently, subsequent processes such as trimming, flanging, and deburring are performed to form a high-quality box body 10.

[0094] In some embodiments, a groove 111 can be formed on the side surface of the bottom wall 11 adjacent to the accommodating space 10a by stamping, injection molding, hot pressing, laser engraving, or ultrasonic processing. For example, a secondary stamping can be performed on the basis of stamping the box body 10 to form the groove 111 on the surface of the bottom wall 11. The shape and position of the groove 111 can be adjusted accordingly according to the placement of the battery cell 20, and the design method is diverse. In addition, the stamping process is suitable for mass production of the box body 10, which can improve the consistency and production efficiency of the box body 10.

[0095] One side surface of the heat exchange bottom plate 30 contacts the bottom wall 11 of the box body 10 , and the other side surface contacts the battery cell 20 .

[0096] It is understood that the surface of the heat exchange bottom plate 30 facing the battery cell 20 is a flat surface. The thickness of different parts of the heat exchange bottom plate 30 can be equal or different.

[0097] 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.

[0098] 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.

[0099] In some embodiments, the heat exchange base plate 30 and the housing 10 may be connected by bonding, welding, or bolting. For example, the heat exchange base plate 30 and the housing 10 may be connected by brazing. The heat exchange base plate 30 may be connected to the bottom wall 11 of the housing 10, or to both the bottom wall 11 and the side walls 12 of the housing 10.

[0100] 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 channel. 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 channel. 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.

[0101] Since the heat exchange base plate 30 is a flat plate structure, even if there are some process defects in the groove 111, the flatness of the assembly surface of the heat exchange base plate 30 and the battery cell 20 can be improved, the contact area between the heat exchange base plate 30 and the battery cell 20 is larger, and the heat exchange base plate 30 can evenly exchange the heat of the battery cell 20 with the heat of the heat exchange medium in the first heat exchange channel, thereby improving the heat exchange efficiency of the battery 1001.

[0102] Figure 5 This is a schematic structural diagram of the heat exchange base plate of some embodiments of the present application. Figure 6 This is a side view of a box provided in an embodiment of the present application. Figure 7 for Figure 6 A partial enlarged view of part B in the middle. Figure 8 This is a schematic diagram of the structure of the connecting pipes in some embodiments of the present application. Figure 2 、 Figures 5 to 8 The heat exchange bottom plate 30 has a first heat exchange port 31, which passes through the heat exchange bottom plate 30 and is connected to the first heat exchange channel. The side wall 12 of the box body 10 has a second heat exchange port 121, which passes through the side wall 12. The battery 1001 also includes a connecting pipe 40, which connects the first heat exchange port 31 and the second heat exchange port 121. Figure 2 and Figure 8 One end of the communicating pipe 40 communicating with the first heat exchange port 31 has a protrusion 43 , and the protrusion 43 surrounds the outer wall of the communicating pipe 40 .

[0103] Figure 9 This is a top view of the heat exchange base plate of some embodiments of the present application. Figure 10for Figure 9 A partial enlarged view of the middle C part, see Figure 9 and Figure 10 According to some embodiments of the present application, the heat exchange bottom plate 30 has a positioning protrusion 32 on one side of the surface facing the accommodation space 10a. Along the penetrating direction of the second heat exchange port 121, at least a portion of the positioning protrusion 32 is located between the first heat exchange port 31 and the second heat exchange port 121. Figure 2 、 Figure 8 and Figure 9 , the protrusion 43 abuts against the positioning protrusion 32.

[0104] In some embodiments, the first heat exchange port 31 may be formed on the heat exchange bottom plate 30 by laser cutting, blanking, etc. In some embodiments, the second heat exchange port 121 may also be formed on the side wall 12 by laser cutting, blanking, etc.

[0105] In some embodiments, the shapes of the first heat exchange port 31 and the second heat exchange port 121 include, but are not limited to, circular, square, or triangular, etc. The shapes of the first heat exchange port 31 and the second heat exchange port 121 can be the same or different.

[0106] The penetration direction of the first heat exchange port 31 intersects with the surface of the heat exchange base plate 30. For example, the penetration direction of the first heat exchange port 31 is perpendicular to the surface of the heat exchange base plate 30, that is, the first heat exchange port 31 penetrates the heat exchange base plate 30 along the thickness direction of the heat exchange base plate 30.

[0107] The penetration direction of the second heat exchange port 121 intersects with the surface of the side wall 12 . Exemplarily, the penetration direction of the second heat exchange port 121 is perpendicular to the surface of the side wall 12 , that is, the second heat exchange port 121 penetrates the side wall 12 along the thickness direction of the side wall 12 .

[0108] The aperture of the first heat exchange port 31 may be uniform or uneven along the direction through which it passes. The aperture of the second heat exchange port 121 may be uniform or uneven along the direction through which it passes.

[0109] In some embodiments, the first heat exchange port 31 may be located at an edge of the heat exchange bottom plate 30 .

[0110] The number of the first heat exchange ports 31 may be one, two, or more.

[0111] The number of the second heat exchange ports 121 can be one, two, or more, and the number of the second heat exchange ports 121 corresponds to the number of the first heat exchange ports 31 in a one-to-one manner.

[0112] It can be understood that one end of the connecting pipe 40 is connected to the first heat exchange channel through the first heat exchange port 31, and the other end of the connecting pipe 40 can be connected to the second heat exchange port 121, so that the first heat exchange channel can be connected to other devices outside the box body 10.

[0113] In some embodiments of the present application, reference is made to 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.

[0114] 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.

[0115] See also Figure 2 and Figure 8 The 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 .

[0116] 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.

[0117] The embodiment of the present application does not limit the specific shape of the communication pipe 40. For example, the communication pipe 40 can be formed into an L-shaped bent aluminum pipe through a bending process. The cross-sectional shape of the communication pipe 40 can be circular.

[0118] In some embodiments, a local extrusion process can be used to provide a protrusion 43 at the opening of one end of the connecting pipe 40 that contacts the first heat exchange port 31. The protrusion 43 is arranged circumferentially around the first heat exchange port 31 to form a flange surface, so that the flange surface can cover the first heat exchange port 31, reducing the risk of the heat exchange medium overflowing or leaking from the first heat exchange port 31.

[0119] The communicating pipe 40 and the first heat exchange port 31 may be connected by welding, bonding, or bolting.

[0120] In the embodiment of the present application, while the box body 10 is kept closed, the heat exchange medium in the first heat exchange channel can be replenished or adjusted at any time through the connecting pipe 40, and the operation is simple and quick.

[0121] The positioning protrusion 32 may or may not contact the opening edge of the first heat exchange port 31 .

[0122] Figure 11 This is a partial cross-sectional diagram of the assembly of the box, heat exchange bottom plate and connecting pipes in some embodiments of the present application. Figure 11 The positioning protrusion 32 fits with the protrusion 43 to position the communicating pipe 40, and the shape of the positioning protrusion 32 can match the cross-sectional shape of the communicating pipe 40. For example, when the cross-sectional shape of the communicating pipe 40 is circular, the shape of the positioning protrusion 32 can be a semicircular arc.

[0123] 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.

[0124] In the embodiment of the present application, by providing a positioning protrusion 32, when the connecting pipe 40 is installed at the first heat exchange port 31, the protrusion 43 can press against the positioning protrusion 32, thereby fixing the position of the connecting pipe 40 at the first heat exchange port 31, facilitating the connection between the connecting pipe 40 and the heat exchange base plate 30, and improving the efficiency of assembling the connecting pipe 40, that is, improving the installation efficiency of the battery.

[0125] In related art, when water-cooling pipes and contoured grooves are provided on the bottom wall 11 of the housing 10, the water-cooling pipes and contoured grooves are typically joined together through hot pressing, which involves numerous steps and a complex manufacturing process. However, in the embodiment of the present application, by providing a heat exchange base plate 30 covering the groove 111 of the bottom wall 11, a first heat exchange channel is formed to exchange heat with the battery cells 20. Furthermore, the connection between the heat exchange base plate 30 and the housing 10 is simplified, making it easier to operate.

[0126] In the related art, when water-cooling tubes and contoured grooves are provided on the bottom wall 11 of the housing 10, the poor flatness of the mounting surfaces of the water-cooling tubes and contoured grooves can easily cause localized squeezing of the battery cells 20, leading to damage to the internal structure of the battery cells 20 or performance abnormalities, such as a reduction in the insulation withstand voltage threshold, thereby causing failure of the battery 1001. In the embodiment of the present application, however, the better flatness of the mounting surfaces of the heat exchange base plate 30 and the battery cells 20 makes it less likely that the heat exchange base plate 30 will cause localized squeezing of the battery cells 20, thereby improving the reliability of the battery 1001.

[0127] At the same time, a first heat exchange channel is formed by the bottom wall 11 of the box body 10 and the heat exchange bottom plate 30 to perform thermal management on the battery cell 20, saving the space originally occupied by the heat exchange component in the battery 1001, reducing the volume of the battery 1001, and improving the energy density of the battery 1001.

[0128] In some embodiments of the present application, a heat exchange through hole can be provided on the bottom wall 11 or the side wall 12 of the box body 10, and the heat exchange through hole is connected to the first heat exchange channel, and the heat exchange medium can be input or output into or out of the first heat exchange channel through the heat exchange through hole.

[0129] According to some embodiments of the present application, reference Figure 6 and Figure 7 The side wall 12 also has a plurality of connection holes 122, and the plurality of connection holes 122 are spaced around the second heat exchange port 121. The battery 1001 also includes a sealing flange 50. Figure 12 This is a schematic diagram of the structure of the sealing flange in some embodiments of the present application. Figure 13 This is a schematic diagram of the exploded structure of the sealing flange of some embodiments of the present application, combined with Figure 6 、 Figure 7 、 Figures 11 to 13 The sealing flange 50 includes a locking cover 51, multiple locking buckles 52, a first sealing ring 53, and a second sealing ring 54. The locking cover 51 surrounds the second heat exchange port 121 and is in contact with the side surface of the side wall 12 facing away from the accommodation space 10a. The communication pipe 40 passes through the locking cover 51. The multiple locking buckles 52 surround the second heat exchange port 121 at intervals. The multiple locking buckles 52 correspond one-to-one with the multiple connecting holes 122. One end of the locking buckle 52 is connected to the side surface of the locking cover 51 facing the side wall 12, and the other end of the locking buckle 52 passes through the connecting hole 122 and abuts against the side wall 12. The first sealing ring 53 is located between the locking cover 51 and the side wall 12 and surrounds the multiple locking buckles 52.

[0130] That is, the sealing flange 50 is connected to the side wall 12 on the outside of the box body 10. In some embodiments, the connection between the sealing flange 50 and the side wall 12 includes, but is not limited to, a bolt connection or a locking connection.

[0131] In some embodiments, the sealing flange 50 is a hollow structure, so that the sealing flange 50 can be sleeved on the outer circumference of the communicating pipe 40 .

[0132] The sealing flange 50 contacts both the outer surface of the communication pipe 40 and the side wall 12 .

[0133] The shape of the sealing flange 50 includes but is not limited to circular, square, or hexagonal.

[0134] In some embodiments, a plurality of connection holes 122 may be formed on the side wall 12 by laser cutting, blanking, or the like.

[0135] In some embodiments, the plurality of connection holes 122 may be evenly spaced apart along the circumference of the second heat exchange port 121. For example, the number of the connection holes 122 may be six.

[0136] The size of the connection hole 122 may be smaller than that of the second heat exchange port 121 .

[0137] 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.

[0138] 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.

[0139] In some embodiments, a plurality of lock buckles 52 may be evenly spaced along the circumference of the lock cover 51 , so that the first sealing ring 53 and the second sealing ring 54 are subjected to uniform force, thereby improving the sealing effect.

[0140] It can be understood that one end of the lock buckle 52 is located outside the box body 10, and the other end of the lock buckle 52 passes through the connecting hole 122 and is located inside the box body 10. In some embodiments, the shape of the lock buckle 52 can be similar to a U-shape. The lock buckle 52 may 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, and at the same time, 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 side wall 12 to achieve the self-locking function of the sealing flange 50.

[0141] 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.

[0142] In some embodiments, along the circumferential direction of the communicating pipe 40 , a surface of the locking cover 51 facing the side wall 12 may have a groove for accommodating the first sealing ring 53 .

[0143] 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.

[0144] In an embodiment of the present application, multiple locking buckles 52 can pass through the connecting hole 122 and abut against the side wall 12, thereby fixing the relative position between the connecting pipe 40 and the second heat exchange port 121. The self-locking effect of the sealing flange 50 can be achieved by a simple pressing operation, which is convenient for installation and use, and can also reduce the risk of the sealing flange 50 falling off from the side wall 12 under working conditions such as vibration or impact; in addition, the first sealing ring 53 can enhance the sealing between the sealing flange 50 and the side wall 12, and the second sealing ring 54 can improve the sealing between the sealing flange 50 and the connecting pipe 40, thereby improving the sealing effect of the sealing flange 50 on the second heat exchange port 121, which is beneficial to maintaining the airtightness inside the box body 10.

[0145] 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.

[0146] In the related art, the sealing flange 50 may be a flange plate, secured to the mounting interface by fasteners, such as bolts. This results in a large number of assembly parts and a complex installation process. However, in the embodiment of the present application, the sealing flange 50 includes multiple locking latches 52, eliminating the need for additional fasteners when connecting the sealing flange 50 to the second heat exchange port 121. This allows for a self-locking function achieved through the multiple locking latches 52, facilitating operation and reducing the number of parts in the battery 1001.

[0147] According to some embodiments of the present application, reference Figure 11 and Figure 13 The locking cover 51 has a mounting groove 56 , the opening of the mounting groove 56 faces the side wall 12 , the sealing flange 50 also includes a sealing core 55 and a second sealing ring 54 , the sealing core 55 is located in the mounting groove 56 , the connecting pipe 40 passes through the sealing core 55 , and the second sealing ring 54 is located between the sealing core 55 and the connecting pipe 40 .

[0148] In some embodiments, a surface of the locking cover 51 facing the side wall 12 is recessed in a direction away from the side wall 12 to form a mounting groove 56 . The mounting groove 56 may be located in the middle of the locking cover 51 .

[0149] In some embodiments, the shape of the mounting groove 56 includes but is not limited to a circle, a square, a pentagon or other irregular shapes.

[0150] The sealing core 55 may be disposed around the circumference of the communication pipe 40 .

[0151] In some embodiments, a surface of the sealing core 55 facing the communicating pipe 40 may have a groove, so that the second sealing ring 54 may be located in the groove of the sealing core 55 .

[0152] The sealing core 55 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. The sealing core 55 may be manufactured by a molding process.

[0153] Exemplarily, the sealing core 55 can be made of hard silicone rubber, and the connecting pipe 40 and the side wall 12 can be made of metal. In this way, 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 second heat exchange port 121 and the connecting pipe 40.

[0154] In some embodiments, hard silicone rubber may be adhered to the surface of the side wall 12 and then vulcanized under heating and pressurizing conditions to achieve adhesion between the side wall 12 and the hard silicone rubber and achieve a sealing effect.

[0155] In other embodiments, a layer of adhesive may be applied to the surface of the side wall 12 to adhere the hard silicone rubber to the surface of the side wall 12 , and then the hard silicone rubber may be vulcanized to achieve adhesion and a sealing effect.

[0156] 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.

[0157] In the embodiment of the present application, by providing a sealing core 55, a first sealing ring 53 and a second sealing ring 54, the sealing effect of the sealing flange 50 on the second heat exchange port 121 can be improved, which is beneficial to maintaining the airtightness inside the box body 10 and improving the service life of the battery 1001.

[0158] 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.

[0159] Figure 14This is one of the partial structural diagrams of the battery of some embodiments of the present application, refer to Figure 14 According to some embodiments of the present application, the battery 1001 also includes a heat exchange side plate 60, which is located in the accommodating space 10a. The heat exchange side plate 60 is located on at least one side of the battery cell 20, and 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 channel, and the second heat exchange channel is connected to the first heat exchange channel.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] It can be understood that the heat exchange side plate 60 has a cavity inside, thereby forming a second heat exchange flow channel.

[0164] 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 channel and the second heat exchange channel 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 .

[0165] According to some embodiments of the present application, Figure 15 This is the second schematic diagram of the partial structure of the battery in some embodiments of the present application. Figure 15 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 larger than the area of ​​the second surface, and the area of ​​the first surface is larger 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.

[0166] The first surface is perpendicular to the heat exchange bottom plate.

[0167] When the heat exchange bottom plate and the second surface are in contact, the heat exchange side plate and the third surface are in contact; when the heat exchange bottom plate and the third surface are in contact, the heat exchange side plate and the second surface are in contact.

[0168] The battery cell 20 may be square in shape.

[0169] 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 first side 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.

[0170] 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.

[0171] According to some embodiments of the present application, Figure 16 This is a schematic structural diagram of the first current collector in some embodiments of the present application. Figure 17 This is a bottom view of the first current collector of some embodiments of the present application. Figure 18 This is a front view of the first current collector of some embodiments of the present application. Figure 19 for Figure 18 A partial enlarged view of the middle E part. Figure 9 、 Figures 14 to 19 The heat exchange bottom plate 30 has a first heat exchange hole 33, which is connected to the first heat exchange flow channel. The battery 1001 also includes a first current collector 70, which is located on the side of the heat exchange bottom plate 30 close to the battery cell 20. The first current collector 70 is connected to the heat exchange bottom plate 30 and covers the first heat exchange hole 33. The first current collector 70 has a second heat exchange hole 71 and a third heat exchange hole 72 that are connected to each other. The second heat exchange hole 71 is connected to the first heat exchange hole 33, and the third heat exchange hole 72 is connected to the second heat exchange flow channel.

[0172] In some embodiments, the first heat exchange holes 33 , the second heat exchange holes 71 and the third heat exchange holes 72 may be formed by laser cutting, blanking or the like.

[0173] In some embodiments, the connection between the first current collector 70 and the heat exchange base plate 30 includes, but is not limited to, welding, bonding, or bolting. For example, the first current collector 70 and the heat exchange base plate 30 are connected by welding. It is understood that the first current collector 70 is located directly above the first heat exchange holes 33.

[0174] In some embodiments, the first current collector 70 is made of metal materials including, but not limited to, stainless steel, aluminum alloy, aluminum, etc. For example, the first current collector 70 may be made of AL3003 and may be manufactured by an aluminum extrusion process.

[0175] The cross-sectional shape of the first current collector 70 includes, but is not limited to, square, circular, or other shapes.

[0176] The first current collector 70 has a cavity therein.

[0177] In some embodiments, the second heat exchange holes 71 may be located on a side of the first current collector 70 close to the heat exchange bottom plate 30 , and the third heat exchange holes 72 may be located on a side of the first current collector 70 away from the heat exchange bottom plate 30 .

[0178] The number of the second heat exchange holes 71 and the number of the third heat exchange holes 72 may be equal or unequal.

[0179] For example, the number of first heat exchange holes 33 may be six, the number of first current collectors 70 may be two, each first current collector 70 being located directly above three first heat exchange holes 33, the number of second heat exchange holes 71 may be three, each second heat exchange hole 71 corresponding to each first heat exchange hole 33, and the number of third heat exchange holes 72 may be five. The number of third heat exchange holes 72 is the same as the number of heat exchange side plates 60.

[0180] In some embodiments, the shape of the first heat exchange hole 33 includes but is not limited to a circle, a triangle, a square or other irregular shapes. For example, the shape of the first heat exchange hole 33 is a circle.

[0181] In some embodiments, the shape of the second heat exchange hole 71 includes but is not limited to a circle, a triangle, a square or other irregular shapes. For example, the shape of the second heat exchange hole 71 is a circle.

[0182] In some embodiments, the shape of the third heat exchange hole 72 includes but is not limited to a circle, a triangle, a square or other irregular shapes. For example, the shape of the third heat exchange hole 72 is a square.

[0183] Figure 20 This is a schematic diagram of the structure of the first current collector end cap in some embodiments of the present application, refer to Figure 20Battery 1001 may further include first current collector end caps 74, which are mounted on both ends of the first current collector 70 to seal the openings at both ends of the first current collector 70. The first current collector end caps 74 may be made of, but not limited to, stainless steel, aluminum alloy, aluminum, or other metal materials. For example, the first current collector end caps 74 may be made of AL3003 and formed by machining. The first current collector end caps 74 may be welded to the first current collector 70, such as by brazing.

[0184] In the embodiment of the present application, a first current collector 70 is provided so that the heat exchange medium can be gathered in the first current collector 70 and then evenly transferred to the second heat exchange flow channel of the heat exchange side plate 60, thereby improving the uniformity of heat exchange between different heat exchange side plates 60 on the side surfaces of the battery cells 20 and improving the heat exchange efficiency.

[0185] Figure 21 This is a schematic structural diagram of the heat exchange side plate in some embodiments of the present application. Figure 22 This is a cross-sectional schematic diagram of the assembly of the heat exchange side plate and the first current collector in some embodiments of the present application. Figure 23 This is a schematic diagram of the exploded structure of the heat exchange side plate and the first current collector in some embodiments of the present application. Figure 24 This is a cross-sectional schematic diagram of the assembly of the heat exchange plate, the first current collector and the second current collector in some embodiments of the present application. Figures 21 to 24 According to some embodiments of the present application, the heat exchange side plate 60 includes a heat exchange plate 61 and a second current collector 62. The second heat exchange flow channel is located on the heat exchange plate 61, which is located on at least one side of the battery cell 20. The second current collector 62 is located on at least one side of the heat exchange plate 61, and at least one end of the heat exchange plate 61 is connected to the second current collector 62. The second current collector 62 has a connecting channel 622, and the second heat exchange flow channel is connected to the connecting channel 622. The second current collector 62 is connected to the first current collector 70, and the connecting channel 622 is connected to the third heat exchange hole 72.

[0186] In some embodiments, the heat exchange plate 61 may have only one or more second heat exchange channels. For example, the plurality of second heat exchange channels may extend along the length of the heat exchange plate 61, or may be spaced apart along the width of the heat exchange plate 61. The number of second heat exchange channels may be eight.

[0187] In some embodiments, the inner wall surface of the heat exchange plate 61 may be provided with a plurality of reinforcing ribs, thereby improving the structural strength and rigidity of the heat exchange plate 61. The present embodiment does not limit the structure and material of the reinforcing ribs.

[0188] The heat exchange plate 61 may be made of a metal material, such as an aluminum alloy. For example, the heat exchange plate 61 may be made of AL3003. In some embodiments, the heat exchange plate 61 may be manufactured by an extrusion process.

[0189] In some embodiments, the second current collector 62 may be located on at least one side of the heat exchange plate 61 along the length of the heat exchange plate 61. For example, the second current collector 62 may be located on both sides of the heat exchange plate 61 along the length of the heat exchange plate 61.

[0190] In some embodiments, the second current collector 62 and the heat exchange plate 61 can be integrally formed or can be two independent structures. The connection between the second current collector 62 and the heat exchange plate 61 includes but is not limited to welding, bolting or snap connection.

[0191] The connection method between the second current collector 62 and the first current collector 70 includes, but is not limited to, welding connection, bolt connection, or snap connection.

[0192] The second current collector 62 has a cavity and may be perpendicular to the first current collector 70 or not.

[0193] The second current collector 62 may be made of a metal material, such as an aluminum alloy. For example, the second current collector 62 may be made of AL3003. In some embodiments, the second current collector 62 may be manufactured by machining.

[0194] In the embodiment of the present application, the heat exchange medium can be gathered in the second current collector 62 and evenly dispersed in the second heat exchange flow channel, thereby improving the uniformity of heat exchange between the heat exchange side plate 60 and the battery cell 20 .

[0195] Figure 25 This is a side view of the second current collector of some embodiments of the present application, refer to Figure 23 and Figure 25 According to some embodiments of the present application, the second fluid collector 62 has a guide groove 621 on one side surface facing the heat exchange plate 61, the connecting channel 622 passes through the side of the guide groove 621, at least one end of the heat exchange plate 61 is located in the guide groove 621, and the second heat exchange channel passes through the side surface of the heat exchange plate 61 facing the guide groove 621.

[0196] It is understood that the second current collector 62 has an opening on one side facing the heat exchange plate 61, and at least one end of the heat exchange plate 61 extends into the opening to be located in the guide groove 621. In some embodiments, the heat exchange plate 61 can be connected to the guide groove 621 by laser welding.

[0197] The opening shape of the guide groove 621 can be adapted to the cross-sectional shape of the heat exchange plate 61. For example, the opening shape of the guide groove 621 can be rectangular, and the cross-sectional shape of the heat exchange plate 61 can also be rectangular.

[0198] The heat exchange bottom plate 30 may be perpendicular to the guide groove 621. The guide groove 621 communicates with the first heat exchange channel and the second heat exchange channel.

[0199] In the embodiment of the present application, the heat exchange plate 61 is easily inserted into the guide groove 621 and connected to the second current collector 62, which can improve the connection strength between the two. At the same time, the cross-sectional area of ​​the second heat exchange channel is large enough, which is conducive to quickly transporting the heat exchange medium accumulated in the guide groove 621 to the second heat exchange channel, thereby improving the heat exchange efficiency of the battery cell 20.

[0200] In the related art, heat is exchanged from the sides of the battery cells 20 via harmonica tube plates. The current collectors at both ends of the harmonica tube plates feature specially shaped nozzles, which necessitates high manufacturing requirements and high machining costs. Furthermore, the harmonica tube plates typically come in sets, requiring at least three different styles for a single battery 1001, resulting in high mold costs. In contrast, in the embodiment of the present application, the second current collectors 62 at both ends of the heat exchange plate 61 feature flow guide grooves 621, simplifying part processing and reducing machining costs. Furthermore, the heat exchange side plates 60 only have one shape, reducing mold costs.

[0201] refer to Figure 25 According to some embodiments of the present application, the bottom surface of the guide groove 621 is provided with a limit block 6211, and the heat exchange plate 61 is against the limit block 6211.

[0202] The embodiment of the present application does not limit the shape of the limit block 6211. The limit block 6211 may be in any three-dimensional structure. For example, the limit block 6211 may be in the shape of a cuboid.

[0203] It can be understood that due to the presence of the limit block 6211 , the heat exchange plate 61 cannot contact the bottom surface of the guide groove 621 , so that a certain distance can be formed between the heat exchange plate 61 and the bottom surface of the guide groove 621 .

[0204] In some embodiments, the number of the limiting blocks 6211 may be four, and the four limiting blocks 6211 may be located at the edge of the guide groove 621. The limiting blocks 6211 may also contact the side surfaces of the guide groove 621.

[0205] In an embodiment of the present application, the limit block 6211 can limit the heat exchange plate 61 from completely contacting the bottom surface of the guide groove 621, thereby forming a space for the heat exchange medium to pass through between the heat exchange plate 61 and the bottom surface of the guide groove 621, thereby improving the transportation efficiency of the heat exchange medium and thus improving the heat exchange efficiency of the battery cell 20.

[0206] refer to Figures 22 to 24According to some embodiments of the present application, the first current collector 70 has a mounting block 73 on one side surface facing the second current collector 62, the third heat exchange hole 72 passes through the mounting block 73, one end of the second current collector 62 is located in the mounting block 73, and the battery 1001 also includes a third sealing ring 80, which is located between the second current collector 62 and the mounting block 73.

[0207] That is, the mounting block 73 protrudes from the remaining surface of the second current collector 62 .

[0208] In some embodiments, the mounting block 73 and the first current collector 70 may be integrally formed or may be two independent structures. For example, the mounting block 73 may be connected to the first current collector 70 by welding.

[0209] In some embodiments, the maximum outer diameter of one end of the second current collector 62 is smaller than the minimum inner diameter of the third heat exchange hole 72 , so that one end of the second current collector 62 can be inserted into the mounting block 73 to connect with the first current collector 70 .

[0210] In some embodiments, an outer surface of one end of the second current collector 62 may have a groove for accommodating the third sealing ring 80 .

[0211] The third sealing ring 80 may be sleeved on the outer surface of the second current collector 62 .

[0212] The materials of the third sealing ring 80 include, but are 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 third sealing ring 80 can be ethylene propylene rubber. The third sealing ring 80 can be manufactured by a molding process.

[0213] In the embodiment of the present application, the second current collector 62 is connected to the mounting block 73, which can increase the contact area between the second current collector 62 and the first current collector 70 and improve the connection strength between the two. At the same time, the third sealing ring 80 can enhance the sealing performance of the connection between the second current collector 62 and the mounting block 73, reducing the risk of heat exchange medium overflowing or leaking from the connection.

[0214] refer to Figure 24 According to some embodiments of the present application, the outer wall of the second current collector 62 has a mounting groove 623, the mounting groove 623 surrounds the outer wall of the second current collector 62, the mounting groove 623 is adjacent to the mounting block 73, and the outer wall of the mounting block 73 has a locking groove 731. The battery 1001 also includes a sealing nest 90, which is sleeved on the second current collector 62 and the mounting block 73. A portion of the sealing nest 90 is located in the mounting groove 623, and the end of the sealing nest 90 away from the mounting groove 623 has a locking hook 91, which is located in the locking groove 731.

[0215] In some embodiments, an edge of the mounting groove 623 close to the heat exchange bottom plate 30 may be flush with an edge of the mounting block 73 away from the heat exchange bottom plate 30 , or may be spaced apart from each other.

[0216] The sealing nest 90 contacts both the second current collector 62 and the mounting block 73 .

[0217] In some embodiments, the sealing nest 90 may be made of a polyamide reinforced glass fiber composite material. For example, the sealing nest 90 is made of PA66-GF and may be manufactured by an injection molding process.

[0218] In some embodiments, a cutout may be reserved on one side of the sealing nest 90 to facilitate splitting the cutout of the sealing nest 90 to both sides and fitting it into the mounting groove 623 , and finally gluing the cutout together by applying adhesive or the like.

[0219] In some embodiments, the end of the sealing nest 90 near the mounting block 73 may be provided with multiple expansion portions. These expansion portions can enhance the deformability of the edges of the sealing nest 90 and improve the fit between the sealing nest 90 and the locking groove 731. For example, the number of expansion portions may be eight. If the end of the sealing nest 90 near the mounting block 73 has four edges, each edge may include two expansion portions. If two expansion portions are provided on one edge of the sealing nest 90, the locking barb 91 may be located between the two expansion portions.

[0220] During the installation process of the sealing nest 90 and the mounting block 73, the expansion portion can cause part of the sealing nest 90 to undergo elastic deformation, and when the locking hook 91 is installed in the locking groove 731, it automatically rebounds and embeds into the locking groove 731 to achieve locking.

[0221] It can be understood that the locking barb 91 is located on a side of the sealing nest 90 close to the locking groove 731. The shape of the locking barb 91 can be adapted to the shape of the locking groove 731.

[0222] In the embodiment of the present application, the sealing nest 90 can realize a self-locking function, which is conducive to fixing the relative position between the second current collector 62 and the mounting block 73, reducing the possibility of the second current collector 62 shaking at the mounting block 73, improving the connection stability between the two, and simplifying the connection method between the second current collector 62 and the mounting block 73.

[0223] In related art, heat exchange is performed on the side of a battery cell 20 by combining a harmonica tube plate with a specific tube body (such as an injection-molded tube). This involves a large number of parts, a complex assembly process, and low production efficiency. In contrast, in the embodiment of the present application, the heat exchange side plate 60 and the first current collector 70 are connected by inserting the second current collector 62 into the mounting block 73 of the first current collector 70 and securing the second current collector 62 and mounting block 73 together using locking barbs 91. This reduces the number of parts involved, simplifies the assembly process, and improves the production efficiency of the battery 1001.

[0224] refer to Figure 24 According to some embodiments of the present application, the battery 1001 further includes a fourth sealing ring 100 located in the mounting groove 623 , the fourth sealing ring 100 surrounds the second current collector 62 , and the fourth sealing ring 100 contacts the mounting block 73 and the sealing nest 90 .

[0225] That is, the fourth sealing ring 100 is in contact with the second current collector 62 , the mounting block 73 and the sealing nest 90 .

[0226] The fourth sealing ring 100 may protrude from the mounting groove 623 , and the protruding portion may contact the mounting block 73 .

[0227] The fourth sealing ring 100 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 fourth sealing ring 100 may be made of ethylene propylene rubber. The fourth sealing ring 100 may be manufactured by a molding process.

[0228] In some embodiments, the steps of assembling the heat exchange side plate 60 and the first current collector 70 may include:

[0229] (1) Install the second current collector 62 on the heat exchange plate 61, and weld the installation position by laser welding;

[0230] (2) Install the sealing nest 90, the third sealing ring 80 and the fourth sealing ring 100 onto the surface of the second current collector 62;

[0231] (3) The heat exchange side plate 60 is assembled;

[0232] (4) Insert the heat exchange side plate 60 into the mounting block 73 to complete the assembly of the heat exchange side plate 60 and the first fluid collector 70.

[0233] In the embodiment of the present application, the fourth sealing ring 100 can improve the sealing between the sealing nest 90 and the second current collector 62 and the mounting block 73, thereby improving the sealing effect at the connection between the mounting block 73 and the second current collector 62.

[0234] refer to Figure 21 、 Figure 23 and Figure 24 According to some embodiments of the present application, the heat exchange side plate 60 further includes a heat conductive layer 63 , which is located at least on the surface of the heat exchange side plate 60 close to the battery cell 20 .

[0235] The constituent materials of the heat conducting layer 63 include but are not limited to silicone rubber, polyurethane, acrylic, epoxy resin, graphene, etc.

[0236] The heat-conducting layer 63 may be connected to the surface of the heat-exchanging side plate 60 by bonding. The heat-conducting layer 63 may be of an adhesive type.

[0237] In an embodiment of the present application, the steps of assembling the components of the battery 1001 may include:

[0238] (1) The heat exchange base plate 30 is placed on the surface of the bottom wall 11 formed with the groove 111. The side of the heat exchange base plate 30 close to the bottom wall 11 has a flux composite layer and is pre-positioned by spot welding;

[0239] (2) One end of the L-shaped bent tube is attached to the heat exchange bottom plate 30 and pre-positioned by spot welding, and the other end of the L-shaped bent tube is inserted into the second heat exchange port 121 of the side wall 12 of the box body 10;

[0240] (3) Install the two first current collector end caps 74 onto the first current collector 70, place welding rings on the mounting surface and pre-position them by spot welding;

[0241] (4) Install the first current collector 70 prepared in step (3) to the first heat exchange hole 33 of the heat exchange base plate 30, place a welding piece on the installation surface and pre-position it by spot welding;

[0242] (5) After the above parts are assembled, they are welded together into a whole by furnace brazing;

[0243] (6) Install a heat exchange side plate 60 and place a group of battery cells 20; install another heat exchange side plate 60 and place another group of battery cells 20... install all heat exchange side plates 60 and battery cells 20 in sequence; wherein a heat conductive layer 63 is provided between the heat exchange side plate 60 and the battery cells 20;

[0244] (7) A sealing flange 50 is provided adjacent to the L-shaped bent tube and the second heat exchange port 121;

[0245] (8) Install the joint plug 41;

[0246] (9) Battery 1001 is assembled.

[0247] In the embodiment of the present application, the heat-conducting layer 63 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 63 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 flow channel 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.

[0248] Figure 26 This is the second structural diagram of the battery of some embodiments of the present application, refer to Figure 26 The battery 1001 further includes a bottom guard plate 110 , which is located on a side of the box body 10 away from the battery cell 20 , and the bottom guard plate 110 is connected to the box body 10 .

[0249] In some embodiments, the bottom guard plate 110 is made of a material including, but not limited to, aluminum, aluminum alloy, and other metal materials. For example, the bottom guard plate 110 may be made of an aluminum alloy (eg, AL6061).

[0250] In some embodiments, the bottom guard plate 110 may be a planar plate structure.

[0251] In other embodiments, the bottom guard plate 110 may be formed into a basin structure by a stamping process, so that the bottom guard plate 110 may be sleeved around the outer periphery of the box body 10 .

[0252] In some embodiments, the bottom surface of the bottom guard plate 110 of the basin structure can be partially stamped a second time to form a locally reinforced bottom surface structure. For example, multiple grooves can be formed on the bottom surface of the bottom guard plate 110 by stamping. This protects the bottom wall 11 of the box body 10 while reducing the weight of the battery 1001, making it easier to transport and use.

[0253] In some embodiments, the connection between the bottom guard plate 110 and the box body 10 includes, but is not limited to, welding, bonding, bolting, riveting, etc. For example, the bottom guard plate 110 and the box body 10 can be connected by laser welding.

[0254] In the embodiment of the present application, since the bottom guard plate 110 has certain mechanical strength, rigidity and corrosion resistance, the bottom guard plate 110 can play a certain protective role on the bottom wall 11 of the box body 10, reducing the possibility of external force damaging the first heat exchange channel and corrosion of the bottom wall 11, thereby improving the reliability of the battery 1001.

[0255] refer to Figure 26 According to some embodiments of the present application, the battery 1001 further includes a buffer layer 120 located between the box body 10 and the bottom guard plate 110 .

[0256] The buffer layer 120 may be made of materials including, but not limited to, polyurethane, polyethylene, ethylene-vinyl acetate copolymer, polypropylene, cross-linked polyethylene, chloroprene rubber, silicone, or polyvinyl chloride.

[0257] In some embodiments, the buffer layer 120 may be adhesively connected to the bottom wall 11 of the box body 10 and the bottom guard plate 110 , respectively.

[0258] In the embodiment of the present application, the buffer layer 120 has good shock resistance, pressure resistance and buffering properties, so that the buffer layer 120 can absorb part of the external force, reduce the impact of the external force on the first heat exchange channel, and improve the reliability of the battery 1001.

[0259] 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.

[0260] 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.

[0261] 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.

[0262] 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.

[0263] The present embodiment provides a battery 1001 comprising a housing 10, a battery cell 20, and a heat exchange base plate 30. The housing 10 has a storage space 10a, within which the battery cell 20 is located. The heat exchange base plate 30 is connected to the housing 10. A groove 111 is formed on a side of the bottom wall 11 of the housing 10 adjacent to the storage space 10a. The heat exchange base plate 30 is located between the bottom wall 11 and the battery cell 20, covering at least the opening of the groove 111. This forms a first heat exchange channel between the bottom wall 11 and the heat exchange base plate 30.

[0264] The heat exchange base plate 30 has a first heat exchange port 31 that extends through the base plate 30 and communicates with the first heat exchange channel. The side wall 12 of the housing 10 has a second heat exchange port 121 that extends through the side wall 12. The battery 1001 also includes a connecting pipe 40 that connects the first heat exchange port 31 and the second heat exchange port 121. A positioning protrusion 32 is formed on the side of the heat exchange base plate 30 that faces the storage space 10a. Along the direction of penetration of the second heat exchange port 121, at least a portion of the positioning protrusion 32 is located between the first heat exchange port 31 and the second heat exchange port 121. The end of the connecting pipe 40 that connects to the first heat exchange port 31 has a protrusion 43 that surrounds the outer wall of the connecting pipe 40 and abuts against the positioning protrusion 32.

[0265] The side wall 12 also has a plurality of connection holes 122, which are spaced apart and surround the second heat exchange port 121. The battery 1001 also includes a sealing flange 50, which includes a locking cover 51, a plurality of locking latches 52, a first sealing ring 53, and a second sealing ring 54. The locking cover 51 surrounds the second heat exchange port 121 and abuts against the side surface of the side wall 12 facing away from the storage space 10a. The connecting pipe 40 passes through the locking cover 51. The plurality of locking latches 52 are spaced apart and surround the second heat exchange port 121. The plurality of locking latches 52 correspond one-to-one with the plurality of connection holes 122. One end of the locking latch 52 is connected to the side surface of the locking cover 51 facing the side wall 12, and the other end of the locking latch 52 passes through the connection hole 122 and abuts against the side wall 12. The first sealing ring 53 is located between the locking cover 51 and the side wall 12 and surrounds the plurality of locking latches 52. The locking cover 51 has an installation groove 56, the opening of the installation groove 56 faces the side wall 12, and the sealing flange 50 also includes a sealing core 55 and a second sealing ring 54. The sealing core 55 is located in the installation groove 56, and the connecting pipe 40 passes through the sealing core 55. The second sealing ring 54 is located between the sealing core 55 and the connecting pipe 40.

[0266] The battery 1001 also includes a heat exchange side plate 60, which is located in the accommodating space 10a. 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 channel, which is connected to the first heat exchange channel.

[0267] 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 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 30 is in contact with one of the second and third surfaces, and the heat exchange side plate 60 is in contact with the other of the second and third surfaces.

[0268] The heat exchange base plate 30 has a first heat exchange hole 33, which is connected to the first heat exchange channel. The battery 1001 also includes a first current collector 70, which is located on the side of the heat exchange base plate 30 close to the battery cell 20. The first current collector 70 is connected to the heat exchange base plate 30 and covers the first heat exchange hole 33. The first current collector 70 has a second heat exchange hole 71 and a third heat exchange hole 72 that are connected to each other. The second heat exchange hole 71 is connected to the first heat exchange hole 33, and the third heat exchange hole 72 is connected to the second heat exchange channel.

[0269] The heat exchange side plate 60 includes a heat exchange plate 61 and a second current collector 62. The second heat exchange flow channel is located on the heat exchange plate 61, which is located on at least one side of the battery cell 20. The second current collector 62 is located on at least one side of the heat exchange plate 61, and at least one end of the heat exchange plate 61 is connected to the second current collector 62. The second current collector 62 has a connecting channel 622, and the second heat exchange flow channel communicates with the connecting channel 622. The second current collector 62 is connected to the first current collector 70, and the connecting channel 622 communicates with the third heat exchange hole 72.

[0270] The second current collector 62 has a guide groove 621 on the side facing the heat exchange plate 61. A communication channel 622 extends through the side of the guide groove 621. At least one end of the heat exchange plate 61 is located within the guide groove 621. The second heat exchange channel extends through the side of the heat exchange plate 61 facing the guide groove 621. A limit block 6211 is provided on the bottom surface of the guide groove 621, and the heat exchange plate 61 abuts against the limit block 6211.

[0271] The first current collector 70 has a mounting block 73 on one side surface facing the second current collector 62, the third heat exchange hole 72 passes through the mounting block 73, one end of the second current collector 62 is located in the mounting block 73, and the battery 1001 also includes a third sealing ring 80, which is located between the second current collector 62 and the mounting block 73.

[0272] The outer wall of the second current collector 62 has a mounting groove 623, which surrounds the outer wall of the second current collector 62. The mounting groove 623 is adjacent to the mounting block 73, and the outer wall of the mounting block 73 has a locking groove 731. The battery 1001 also includes a sealing nest 90, which is sleeved on the second current collector 62 and the mounting block 73. A portion of the sealing nest 90 is located in the mounting groove 623, and the end of the sealing nest 90 away from the mounting groove 623 has a locking hook 91, which is located in the locking groove 731.

[0273] The battery 1001 further includes a fourth sealing ring 100 located in the mounting groove 623 . The fourth sealing ring 100 surrounds the second current collector 62 and contacts the mounting block 73 and the sealing nest 90 .

[0274] The heat exchange side plate 60 also includes a heat conductive layer 63, located at least on the surface of the heat exchange plate 61 near the battery cells 20. The battery 1001 also includes a bottom protective plate 110, located on the side of the housing 10 away from the battery cells 20. The bottom protective plate 110 is connected to the housing 10. The battery 1001 also includes a buffer layer 120, located between the housing 10 and the bottom protective plate 110.

[0275] 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: A box body (10) has a receiving space (10a), and a bottom wall (11) of the box body (10) has a groove (111) on a side surface close to the receiving space (10a); A battery cell (20) is located in the accommodation space (10a); a heat exchange bottom plate (30) located between the bottom wall (11) and the battery cell (20), the heat exchange bottom plate (30) being connected to the box body (10), the heat exchange bottom plate (30) at least covering the opening of the groove (111), so that a first heat exchange flow channel is formed between the bottom wall (11) and the heat exchange bottom plate (30), the heat exchange bottom plate (30) having a first heat exchange port (31), the first heat exchange port (31) penetrating the heat exchange bottom plate (30), the first heat exchange port (31) being in communication with the first heat exchange flow channel, and the side wall (12) of the box body (10) having a second heat exchange port (121), the second heat exchange port (121) penetrating the side wall (12); a connecting pipe (40) connecting the first heat exchange port (31) and the second heat exchange port (121); wherein, one end of the communicating pipe (40) communicating with the first heat exchange port (31) has a protrusion (43), the protrusion (43) surrounds the outer wall of the communicating pipe (40), and a surface of the heat exchange bottom plate (30) facing the accommodating space (10a) has a positioning protrusion (32), along the penetrating direction of the second heat exchange port (121), at least a portion of the positioning protrusion (32) is located between the first heat exchange port (31) and the second heat exchange port (121), and the protrusion (43) abuts against the positioning protrusion (32); The side wall (12) further comprises a plurality of connection holes (122), the plurality of connection holes (122) being spaced apart and surrounding the second heat exchange port (121), and the battery further comprises a sealing flange (50), the sealing flange (50) comprising: a locking cover (51) surrounding the second heat exchange port (121), the locking cover (51) being in contact with the side wall (12) and the surface of the side wall (12) facing away from the accommodating space (10a), and the communicating pipe (40) passing through the locking cover (51); a plurality of lock buckles (52), the plurality of lock buckles (52) being spaced apart and surrounding the second heat exchange port (121), the plurality of lock buckles (52) corresponding one-to-one to the plurality of connection holes (122), one end of the lock buckle (52) being connected to a surface of a side of the lock cover (51) facing the side wall (12), and the other end of the lock buckle (52) passing through the connection hole (122) and abutting against the side wall (12); A first sealing ring (53) is located between the locking cover (51) and the side wall (12), and the first sealing ring (53) surrounds the plurality of locking buckles (52).

2. The battery according to claim 1, characterized in that The locking cover (51) has a mounting groove (56), the opening of the mounting groove (56) faces the side wall (12), and the sealing flange (50) further includes: A sealing core (55) is located in the mounting groove (56), and the communication pipe (40) passes through the sealing core (55); The second sealing ring (54) is located between the sealing core (55) and the communicating pipe (40).

3. The battery according to claim 1 or 2, characterized in that The battery further comprises: A heat exchange side plate (60) is located in the accommodating space (10a), 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), and the heat exchange side plate (60) has a second heat exchange flow channel, and the second heat exchange flow channel is connected to the first heat exchange flow channel.

4. The battery according to claim 3, characterized in that 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 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 bonded to one of the second surface and the third surface; and the heat exchange side plate (60) is bonded to the other of the second surface and the third surface.

5. The battery according to claim 3, characterized in that The heat exchange bottom plate (30) has a first heat exchange hole (33), the first heat exchange hole (33) is in communication with the first heat exchange channel, and the battery further comprises: The first current collector (70) is located on a side of the heat exchange base plate (30) close to the battery cell (20), the first current collector (70) is connected to the heat exchange base plate (30) and covers the first heat exchange hole (33), the first current collector (70) has a second heat exchange hole (71) and a third heat exchange hole (72) that are connected to each other, the second heat exchange hole (71) is connected to the first heat exchange hole (33), and the third heat exchange hole (72) is connected to the second heat exchange channel.

6. The battery according to claim 5, characterized in that The heat exchange side plate (60) includes: a heat exchange plate (61), the second heat exchange channel being located on the heat exchange plate (61), and the heat exchange plate (61) being located on at least one side of the battery cell (20); The second fluid collector (62) is located on at least one side of the heat exchange plate (61), and at least one end of the heat exchange plate (61) is connected to the second fluid collector (62). The second fluid collector (62) has a connecting channel (622), and the second heat exchange flow channel is connected to the connecting channel (622). The second fluid collector (62) is connected to the first fluid collector (70), and the connecting channel (622) is connected to the third heat exchange hole (72).

7. The battery according to claim 6, characterized in that A guide groove (621) is provided on a side surface of the second current collector (62) facing the heat exchange plate (61), the connecting channel (622) passes through the side surface of the guide groove (621), at least one end of the heat exchange plate (61) is located in the guide groove (621), and the second heat exchange flow channel passes through a side surface of the heat exchange plate (61) facing the guide groove (621).

8. The battery according to claim 7, characterized in that The bottom surface of the guide groove (621) is provided with a limit block (6211), and the heat exchange plate (61) abuts against the limit block (6211).

9. The battery according to claim 6, characterized in that The first current collector (70) has a mounting block (73) on one side of its surface facing the second current collector (62), the third heat exchange hole (72) passes through the mounting block (73), and one end of the second current collector (62) is located in the mounting block (73). The battery further includes: The third sealing ring (80) is located between the second current collector (62) and the mounting block (73).

10. The battery according to claim 9, characterized in that The outer side wall of the second current collector (62) has a mounting groove (623), the mounting groove (623) surrounds the outer side wall of the second current collector (62), the mounting groove (623) is adjacent to the mounting block (73), and the outer side wall of the mounting block (73) has a locking groove (731). The battery further includes: A sealing nest (90), the sealing nest (90) being sleeved on the second current collector (62) and the mounting block (73), a portion of the sealing nest (90) being located in the mounting groove (623), and an end of the sealing nest (90) away from the mounting groove (623) having a locking barb (91), the locking barb (91) being located in the locking groove (731).

11. The battery according to claim 10, characterized in that The battery further comprises: A fourth sealing ring (100) is located in the mounting groove (623), the fourth sealing ring (100) surrounds the second current collector (62), and the fourth sealing ring (100) is in contact with the mounting block (73) and the sealing nest (90).

12. The battery according to claim 6, characterized in that The heat exchange side plate (60) further includes: The heat-conducting layer (63) is located at least on the surface of the heat-exchange side plate (60) close to the battery cell (20).

13. The battery according to claim 1 or 2, characterized in that The battery further comprises: A bottom guard plate (110) is located on a side of the box body (10) away from the battery cell (20), and the bottom guard plate (110) is connected to the box body (10).

14. The battery according to claim 13, characterized in that The battery further comprises: A buffer layer (120) is located between the box body (10) and the bottom guard plate (110).

15. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 1 to 14, and the battery is used to provide electrical energy.

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

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