Battery and electric device

Abstract

The utility model provides a battery and a power utilization device, and belongs to the technical field of batteries. The battery comprises a box body, a heat exchange assembly and a battery monomer, the box body comprises a side wall and a bottom wall which enclose to form a containing cavity. The heat exchange assembly is located in the containing cavity and connected with the box body, and the battery monomers are located on the side, away from the bottom wall, of the heat exchange assembly. A gap is formed between the heat exchange assembly and the bottom wall, so that the heat exchange assembly and the bottom wall form a heat exchange channel, at least one of the side wall and the bottom wall is provided with a heat exchange inlet, at least one of the side wall and the bottom wall is provided with a heat exchange outlet, and the heat exchange inlet and the heat exchange outlet are both communicated with the heat exchange channel. According to the battery structure provided by the invention, the cost of the heat exchange assembly is reduced, meanwhile, the manufacturing process of the battery is simplified, and the battery manufacturing cost is reduced.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their advantages of energy conservation and environmental protection. For electric vehicles, battery technology is an important factor related to their development.

[0003] The battery includes a box, a battery cell and a heat exchange assembly. The battery cell and the heat exchange assembly are both located in the box. The heat exchange assembly is used to adjust the temperature of the battery cell so that the battery cell can work at a suitable temperature and improve the temperature stability of the battery. In the related art, the heat exchange assembly is generally a heat exchange plate with a refrigerant, such as a water-cooled plate, which can take away the heat generated by the battery through the circulation of the coolant, but the cost of the heat exchange assembly is relatively high. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems in the background technology. To this end, one purpose of the present application is to provide a battery and an electrical device for exchanging heat for battery cells, which can reduce costs compared with regulating battery temperature by water cooling.

[0005] The embodiment of the first aspect of the present application provides a battery, the battery comprising a housing, a heat exchange assembly and a battery cell. The housing comprises a side wall and a bottom wall surrounding a receiving cavity. The heat exchange assembly is located in the receiving cavity, the heat exchange assembly is connected to the housing, a gap is provided between the heat exchange assembly and the bottom wall so that the heat exchange assembly and the bottom wall form a heat exchange channel, at least one of the side wall and the bottom wall has a heat exchange inlet, at least one of the side wall and the bottom wall has a heat exchange outlet, and both the heat exchange inlet and the heat exchange outlet are connected to the heat exchange channel. The battery cell is located on the side of the heat exchange assembly away from the bottom wall.

[0006] In the technical solution of the embodiment of the present application, the temperature of the battery cell can be adjusted by flowing a gas with a temperature different from that of the battery cell into the heat exchange channel, and the gas exchanges heat with the battery cell through the heat exchange component, so that the battery cell works at a suitable temperature, thereby improving the temperature stability of the battery. Compared with using water cooling to adjust the battery temperature, using gas as the heat exchange medium does not require waterproofing of the heat exchange component, thereby reducing the cost of the heat exchange component, and at the same time simplifying the battery manufacturing process and reducing the cost of battery manufacturing.

[0007] In some embodiments, the bottom wall includes a first support structure protruding toward the heat exchange channel, the heat exchange assembly is located on a side of the first support structure away from the bottom wall, and there is a gap between the first support structure and the heat exchange assembly. The first support structure can increase the rigidity of the bottom wall of the box body, resist deformation of the box body to a certain extent, and reduce the risk of damaging the heat exchange assembly and battery cells in the box body.

[0008] In some embodiments, the first support structure includes a first reinforcing rib and a second reinforcing rib. The first reinforcing rib extends along a first direction, which is parallel to the surface of the bottom wall; the second reinforcing rib extends along a second direction, which is parallel to the surface of the bottom wall, and the second direction intersects with the first direction. Providing first and second reinforcing ribs with different extension directions can improve the rigidity of the bottom wall from different directions and improve the overall strength of the box. The first and second reinforcing ribs can be integrally formed with other parts of the bottom wall, and the first and second reinforcing ribs can also be welded to the cast bottom wall part. The structure is simple and the processing method is flexible.

[0009] In some embodiments, the first support structure includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, the plurality of first reinforcing ribs are arranged at intervals along the second direction, the plurality of second reinforcing ribs are arranged at intervals along the first direction, and the first reinforcing ribs are connected to the side wall at both opposite ends along the first direction; for the second reinforcing rib located between any two adjacent first reinforcing ribs, one end of the second reinforcing rib along the second direction is connected to one of the two adjacent first reinforcing ribs, and the other end of the second reinforcing rib along the second direction is a free end; for the second reinforcing rib located between the first reinforcing rib and the side wall, one end of the second reinforcing rib along the second direction is connected to the first reinforcing rib, and the other end of the second reinforcing rib along the second direction is connected to the side wall; wherein the heat exchange inlet and the heat exchange outlet are both connected to the gap between the free end of the second reinforcing rib and the first reinforcing rib. Along the second direction, there is a gap between the free ends of two adjacent second reinforcing ribs, so that gas can pass smoothly between the two adjacent first reinforcing ribs, which is beneficial to improving the heat exchange efficiency of the battery cell.

[0010] In some embodiments, for the second reinforcing rib located between two adjacent first reinforcing ribs, one end of the second reinforcing rib along the second direction is connected to the middle of the same first reinforcing rib. This can reduce the obstruction of the bottom wall structure to the gas flow to a certain extent, which is conducive to increasing the flow speed of the gas in the heat exchange channel, so that more gas can exchange heat with the battery cell in the same time, thereby improving the stability of the battery.

[0011] In some embodiments, the first support structure further includes a third reinforcing rib, the third reinforcing rib is located between two adjacent first reinforcing ribs, one end of the third reinforcing rib along the second direction is connected to the other of the two adjacent first reinforcing ribs, the other end of the third reinforcing rib along the second direction is a free end, the free ends of the second reinforcing ribs correspond to the free ends of the third reinforcing ribs one by one, and are spaced apart along the second direction. The third reinforcing rib can be connected to the first reinforcing rib that is not connected to the second reinforcing rib, thereby strengthening the rigidity of the bottom wall.

[0012] In some embodiments, the housing further comprises a first boss, the first boss is connected to the bottom wall, and the first boss protrudes toward the heat exchange channel, the first boss is connected to the first support structure, along the third direction, the height of the first support structure is less than the height of the first boss, the third direction intersects with the surface of the bottom wall, and the heat exchange assembly is connected to the first boss. The first boss provides installation and support for the heat exchange assembly and the battery cell, which can improve the stability of the heat exchange assembly. At the same time, after the first boss is connected to the heat exchange assembly, the heat exchange assembly does not contact the first support structure, and the gap between the heat exchange assembly and the first support structure is used to set the heat exchange channel.

[0013] In some embodiments, the bottom wall includes a plurality of first bosses, which are arranged in an array in the accommodating cavity, and any two adjacent first bosses are spaced apart from each other. The plurality of first bosses are arranged in an array and evenly distributed in the accommodating cavity, and the heat exchange component is connected to the first bosses to better fix the heat exchange component.

[0014] In some embodiments, a surface of the first boss facing away from the accommodating cavity has a groove, and an opening of the groove passes through the surface of the bottom wall facing away from the accommodating cavity. Such a groove structure can reduce the weight of the box.

[0015] In some embodiments, the box body further includes a second supporting structure, the second supporting structure is located in the groove, and the second supporting structure is connected to the groove. The second supporting structure can increase the rigidity of the bottom wall, thereby improving the rigidity of the bottom wall.

[0016] In some embodiments, the heat exchange assembly includes a first heat exchange plate, which is located in the accommodating cavity and connected to the side wall. The first heat exchange plate can exchange heat with the battery cell, and the first heat exchange plate can also exchange heat with the gas flowing into the heat exchange channel, thereby adjusting the temperature of the battery cell. In addition, the first heat exchange plate can reduce the possibility of impurities such as water vapor in the flowing external gas directly contacting the battery cell to a certain extent, thereby reducing the impact on the battery. In addition, the first heat exchange plate has a large contact area with the gas entering the box, thereby improving the heat exchange efficiency, better adjusting the temperature of the battery, and improving the stability of the battery.

[0017] In some embodiments, the heat exchange assembly further includes a second heat exchange plate, the second heat exchange plate is located in the accommodating cavity, the second heat exchange plate is stacked with the first heat exchange plate along a third direction, the second heat exchange plate is located on a side of the first heat exchange plate away from the battery cell, the third direction intersects with the surface of the bottom wall, and the second heat exchange plate has a protrusion protruding toward the heat exchange channel so that a flow channel is formed between the second heat exchange plate and the first heat exchange plate. The second heat exchange plate has a protrusion structure, which can increase the contact area between the heat exchange assembly and the gas flowing through the heat exchange channel, thereby enhancing the heat exchange effect on the battery cell.

[0018] In some embodiments, the heat exchange inlet and the heat exchange outlet are both located on the side wall, so that a one-way flow channel can be formed, so that the gas flow speed in the heat exchange channel is faster, so that more gas can exchange heat with the heat exchange component per unit time, thereby improving the heat exchange efficiency and the temperature stability of the battery.

[0019] In some embodiments, the side wall includes a second boss protruding toward the heat exchange assembly, the second boss surrounds the heat exchange assembly, and the heat exchange assembly is sealed and connected to the second boss. This is conducive to maintaining the airtightness of the space where the battery cell is located, reducing the possibility of impurities brought into the flowing gas in the heat exchange channel contacting the battery cell, and improving the reliability and safety of battery use.

[0020] 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.

[0021] 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

[0022] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the multiple drawings represent the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings only depict some embodiments disclosed in the present application and should not be regarded as limiting the scope of the present application.

[0023] Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application;

[0024] Figure 2 A schematic diagram of a partial explosion of another battery provided in an embodiment of the present application;

[0025] Figure 3 A front view of a box provided in an embodiment of the present application;

[0026] Figure 4A top view of a heat exchange assembly and a box body provided in an embodiment of the present application;

[0027] Figure 5 A cross-sectional schematic diagram of the cooperation between a heat exchange component and a box body provided in an embodiment of the present application;

[0028] Figure 6 A partial top view of a box provided in an embodiment of the present application;

[0029] Figure 7 for Figure 4 Schematic diagram of the cross section of the AA surface;

[0030] Figure 8 for Figure 7 A partial enlarged view of point B in the middle;

[0031] Fig. 9 A cross-sectional schematic diagram of another heat exchange assembly and a box body provided in an embodiment of the present application;

[0032] Fig.10 for Fig. 9 A partial enlarged view of point C in the middle;

[0033] Fig.11 A schematic diagram of the structure of a box provided in an embodiment of the present application when viewed from an upward perspective.

[0034] Description of reference numerals:

[0035] 10. Box body; 11. Accommodating cavity; 12. Side wall; 13. Bottom wall; 131. First supporting structure; 1311. First reinforcing rib; 1312. Second reinforcing rib; 1313. Third reinforcing rib; 15. First boss; 151. Groove; 16. Second supporting structure; 121. Second boss; 14. Heat exchange channel; 141. Heat exchange inlet; 142. Heat exchange outlet; 20. Heat exchange assembly; 21. First heat exchange plate; 22. Second heat exchange plate; 23. Circulation channel; 30. Battery cell. DETAILED DESCRIPTION

[0036] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field 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" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] 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).

[0042] 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. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which 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 referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0043] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0044] At present, from the perspective of market development, the application of power batteries is becoming more and more extensive. Power batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power batteries, the market demand is also constantly expanding.

[0045] Due to the different materials used to make the battery case, the battery case mainly includes metal cases and non-metal cases. Compared with metal cases, non-metal cases can reduce the weight of the case and increase the energy density of the battery cell. The battery case includes at least one battery cell. During the use of the battery cell, the temperature of the battery cell is likely to deviate from its appropriate operating temperature range due to the heat generated by the battery cell when it is working or the influence of the external environment temperature of the battery case, which affects the service life of the battery cell to a certain extent.

[0046] In order to maintain the temperature stability of the battery cells, in the related art, water cooling is usually used to cool the battery cells, such as a water cooling plate structure, but the design of this structure is complex and the cost is high.

[0047] Based on the above considerations, an embodiment of the present application provides a battery, which includes a box, a heat exchange component and a battery cell. The box includes a side wall and a bottom wall surrounding a receiving cavity; the heat exchange component is located in the receiving cavity, the heat exchange component is connected to the box, and there is a gap between the heat exchange component and the bottom wall, so that the heat exchange component and the bottom wall form a heat exchange channel; the battery cell is located on the side of the heat exchange component away from the bottom wall; wherein at least one of the side wall and the bottom wall has a heat exchange inlet, and at least one of the side wall and the bottom wall has a heat exchange outlet, and the heat exchange inlet and the heat exchange outlet are both connected to the heat exchange channel. The heat exchange component is provided to conduct the temperature of the battery cell, and a heat exchange channel is formed between the heat exchange component and the bottom wall. The heat exchange component is heat exchanged by airflow in the heat exchange channel, thereby realizing heat exchange of the battery cell, maintaining the temperature of the battery cell stable within a certain range, and improving the reliability and safety of the battery. Compared with the water cooling method to adjust the battery temperature, the battery structure provided by the embodiment of the present application reduces the cost of the heat exchange component.

[0048] The battery disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships or aircraft. The battery disclosed in the present application can be used to form a power supply system of the electrical device.

[0049] The embodiment of the present application provides an electric device using a battery as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, 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., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0050] The present application embodiment provides a battery, Figure 1 A schematic diagram of the structure of a battery provided in an embodiment of the present application, Figure 2 A schematic diagram of a partial explosion of another battery provided in an embodiment of the present application, Figure 3 This is a front view of a box provided in an embodiment of the present application. Figure 4 A top view of a heat exchange assembly and a box body provided in an embodiment of the present application, Figure 5 A cross-sectional schematic diagram of a heat exchange assembly and a box body provided in an embodiment of the present application. Figures 1 to 5 The battery includes a housing 10, a heat exchange assembly 20 and a battery cell 30. The housing 10 includes a side wall 12 and a bottom wall 13 surrounding a receiving cavity 11. The heat exchange assembly 20 is located in the receiving cavity 11, and the heat exchange assembly 20 is connected to the housing 10. The battery cell 30 is located on the side of the heat exchange assembly 20 away from the bottom wall 13. There is a gap between the heat exchange assembly 20 and the bottom wall 13, so that the heat exchange assembly 20 and the bottom wall 13 form a heat exchange channel 14, at least one of the side wall 12 and the bottom wall 13 has a heat exchange inlet 141, and at least one of the side wall 12 and the bottom wall 13 has a heat exchange outlet 142, and the heat exchange inlet 141 and the heat exchange outlet 142 are both connected to the heat exchange channel 14.

[0051] In the embodiment of the present application, the box body 10 is used to provide a storage space for the heat exchange assembly 20 and the battery cell 30 , and the heat exchange assembly 20 and the battery cell 30 are both located in the storage cavity 11 .

[0052] In the embodiment of the present application, the box body 10 is surrounded by a side wall 12 and a bottom wall 13. In some embodiments, see Figure 1 The side wall 12 may be a hollow structure with one end open, for example, the side wall 12 may be a cylinder or a cuboid with one end open, and the bottom wall 13 covers the open end of the side wall 12. In other embodiments, such as Figure 2 As shown, the side wall 12 may be a hollow structure with openings at both ends, and the box body 10 may also include a top wall ( Figure 2 (not shown), the top wall and the bottom wall 13 cover the two open ends of the side wall 12 respectively.

[0053] In the embodiments of the present application, the bottom wall 13 may be a flat or curved plate-like structure, etc., and the embodiments of the present application are not limited to this.

[0054] In the embodiment of the present application, the shape of the accommodating cavity 11 can be various. The shape of the accommodating cavity 11 can be a cylinder or a cuboid, etc., but the shape of the accommodating cavity 11 is not limited thereto.

[0055] In some embodiments of the present application, the material of the side wall 12 may be a non-metal material, for example, the material of the side wall 12 may be carbon fiber or glass fiber, etc. In other embodiments of the present application, the material of the side wall 12 may be a metal material.

[0056] In some embodiments of the present application, the material of the bottom wall 13 may be a non-metal material, for example, the material of the bottom wall 13 may be carbon fiber or glass fiber, etc. In other embodiments of the present application, the material of the bottom wall 13 may be a metal material.

[0057] In the embodiments of the present application, the side wall 12 and the bottom wall 13 may be connected in various ways. For example, the side wall 12 and the bottom wall 13 may be connected by welding, or the side wall 12 and the bottom wall 13 may be connected by bonding.

[0058] In some embodiments of the present application, the material of the side wall 12 and the material of the bottom wall 13 can be the same, for example, the material of the side wall 12 and the material of the bottom wall 13 are both non-metallic materials. In other embodiments of the present application, the material of the side wall 12 and the material of the bottom wall 13 can be different.

[0059] In the embodiment of the present application, the box 10 has a heat exchange inlet 141 and a heat exchange outlet 142, and the heat exchange channel 14 can be connected to the external environment of the box 10 through the heat exchange inlet 141 or the heat exchange outlet 142. Gas can flow into the heat exchange channel 14 through the heat exchange inlet 141, and the gas exchanges heat with the heat exchange component 20 in the heat exchange channel 14, and the heat exchange component 20 exchanges heat with the battery cell 30. The gas after heat exchange can be discharged from the heat exchange outlet 142, thereby adjusting the temperature of the battery cell 30. Exemplarily, the inflowing gas can be air.

[0060] In the embodiment of the present application, there is a certain temperature difference between the gas flowing into the heat exchange channel 14 and the heat exchange assembly 20 and the battery cell 30, so that the temperature of the battery cell 30 can be adjusted. For example, when the temperature of the battery cell 30 is high, a gas with a lower temperature can flow into the heat exchange channel 14 to absorb the heat of the battery cell 30, thereby reducing the temperature of the battery cell 30; when the temperature of the battery cell 30 is low, a gas with a higher temperature can flow into the heat exchange channel 14 to transfer the heat to the battery cell 30, thereby increasing the temperature of the battery cell 30. In this way, the battery cell 30 can work at a suitable temperature, thereby improving the stability of the battery.

[0061] In some embodiments of the present application, the heat exchange assembly 20 may include a single heat conducting plate or multiple stacked heat conducting plates. For example, the heat conducting plate may be made of a variety of materials, such as aluminum, copper, or alumina ceramic.

[0062] In the embodiment of the present application, the heat exchange assembly 20 may be in contact with the battery cell 30 , or the heat exchange assembly 20 may be arranged without being in contact with the battery cell 30 .

[0063] In an embodiment of the present application, the heat exchange assembly 20 is connected to the box body 10 to improve the stability of the heat exchange assembly 20. For example, the heat exchange assembly 20 can be connected to the side wall 12. The heat exchange assembly 20 can be connected to the side wall 12 in a variety of ways, for example, the heat exchange assembly 20 can be bonded to the side wall 12, or the heat exchange assembly 20 can be welded to the side wall 12, or the heat exchange assembly 20 can be connected to the side wall 12 by bolts.

[0064] In some embodiments of the present application, a portion of the heat exchange assembly 20 contacts the bottom wall 13 , and another portion of the heat exchange assembly 20 does not contact the bottom wall 13 , and a heat exchange channel 14 is formed in the gap between the heat exchange assembly 20 and the bottom wall 13 .

[0065] In some other embodiments of the present application, the heat exchange component 20 does not contact the bottom wall 13 , and a heat exchange channel 14 is formed in the gap between the heat exchange component 20 and the bottom wall 13 .

[0066] The heat exchange channel 14 may have a variety of shapes, for example, the heat exchange channel 14 may have a cylindrical or rectangular shape, etc. The heat exchange channel 14 may be multiple or single. The heat exchange inlet 141 may have a variety of shapes, for example, the heat exchange inlet 141 may have a circular or square shape, etc. The heat exchange outlet 142 may have a variety of shapes, for example, the heat exchange outlet 142 may have a circular or square shape, etc.

[0067] In some embodiments, there are multiple heat exchange inlets 141 and multiple heat exchange outlets 142 , some of the heat exchange inlets 141 are located on the bottom wall 13 , and some of the heat exchange outlets 142 are located on the side wall 12 .

[0068] In some embodiments, there are multiple heat exchange inlets 141 and heat exchange outlets 142 , some of the heat exchange inlets 141 are located on the side wall 12 , and some of the heat exchange outlets 142 are located on the bottom wall 13 .

[0069] In some embodiments, the heat exchange inlet 141 and the heat exchange outlet 142 are both located on the bottom wall 13 .

[0070] Exemplarily, the heat exchange inlet 141 and the heat exchange outlet 142 are both located on the side wall 12, and the heat exchange channel 14 runs through the opposite sides of the side wall 12. The gas enters the accommodating cavity 11 from the heat exchange inlet 141, flows through the heat exchange channel 14 and exchanges heat with the heat exchange component 20 and the battery cell 30, and then flows out of the box body 10 from the heat exchange outlet 142, which can maintain the stability of the operating temperature of the battery cell 30.

[0071] A battery cell 30 is the smallest unit constituting a battery. In a battery, there may be multiple battery cells 30, and the multiple battery cells 30 may be connected in series, in parallel, or in mixed connection. Mixed connection means that the multiple battery cells 30 are connected in both series and in parallel.

[0072] Each battery cell 30 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 30 may be cylindrical, flat, rectangular, or in other shapes.

[0073] In the embodiment of the present application, a gas having a temperature different from that of the battery cell 30 can be flowed into the heat exchange channel 14, and the gas can exchange heat with the battery cell 30 through the heat exchange component 20, thereby adjusting the temperature of the battery cell 30, so that the battery cell 30 operates at a suitable temperature, thereby improving the temperature stability of the battery. Compared with using water cooling to adjust the battery temperature, using gas as the heat exchange medium does not require waterproofing of the heat exchange component 20, thereby reducing the cost of the heat exchange component 20, simplifying the battery manufacturing process, and reducing the cost of manufacturing the battery.

[0074] In the related art, water is used as a heat exchange medium to adjust the battery temperature. In order to reduce the influence of water on the battery cell 30, the heat exchange plate needs to be waterproofed. This process is relatively complicated and increases the cost of manufacturing the battery. In the embodiment of the present application, gas is used as a heat exchange medium to adjust the temperature of the battery cell 30, and the heat exchange assembly 20 does not need to be waterproofed, which simplifies the battery manufacturing process and reduces the cost of manufacturing the battery.

[0075] In the related art, water is used as a heat exchange medium to adjust the battery temperature. Water needs to flow in a set flow channel, and the contact area between water and the battery cell 30 is small, resulting in low heat exchange efficiency. In the embodiment of the present application, gas is used as a heat exchange medium to adjust the temperature of the battery cell 30. The gas can flow in the entire accommodating cavity 11, and the contact area between the gas and the battery cell 30 is increased, which can improve the heat exchange efficiency.

[0076] According to some embodiments of the present application, Figure 6 A partial top view of a box provided in an embodiment of the present application, see Figure 2 and Figure 6The bottom wall 13 includes a first supporting structure 131 protruding toward the heat exchange channel 14 . The heat exchange component 20 is located on a side of the first supporting structure 131 away from the bottom wall 13 . There is a gap between the first supporting structure 131 and the heat exchange component 20 .

[0077] In some embodiments, the first supporting structure 131 does not contact the heat exchange assembly 20 , and a heat exchange channel 14 is formed in a gap between the heat exchange assembly 20 , the bottom wall 13 , and the first supporting structure 131 .

[0078] In other embodiments, a portion of the first support structure 131 is in contact with the heat exchange component 20, and another portion of the first support structure 131 is not in contact with the heat exchange component 20, and a heat exchange channel 14 is formed in the gap between the heat exchange component 20, the bottom wall 13 and the first support structure 131 that is not in contact with the heat exchange component 20.

[0079] It can be understood that the first support structure 131 is a three-dimensional structure. In some embodiments, the first support structure 131 may be in the shape of a cuboid or a cylinder. The first support structure 131 can improve the rigidity of the bottom wall 13. When the box body 10 is squeezed or bumped by the outside world, the box body 10 is not easily deformed or damaged, and the influence of external force factors on the battery cells 30 and the heat exchange assembly 20 in the box body 10 can be reduced to a certain extent, which is conducive to improving the reliability and safety of the battery.

[0080] In the embodiment of the present application, the first supporting structure 131 may be made of a variety of materials. For example, the material of the first supporting structure 131 may be carbon fiber or glass fiber.

[0081] In some embodiments, the first support structure 131 may not be connected to the side wall 12. In other embodiments, the first support structure 131 may also be connected to the side wall 12.

[0082] In the embodiment of the present application, the first support structure 131 can increase the rigidity of the bottom wall 13 of the box body 10 and resist deformation of the box body 10 to a certain extent, so as to reduce the risk of damaging the heat exchange assembly 20 and the battery cell 30 in the box body 10.

[0083] According to some embodiments of the present application, the first support structure 131 includes a first reinforcing rib 1311 and a second reinforcing rib 1312. The first reinforcing rib 1311 extends along a first direction X, and the second reinforcing rib 1312 extends along a second direction Y. Both the first direction X and the second direction Y are parallel to the surface of the bottom wall 13, and the second direction Y intersects with the first direction X.

[0084] The first reinforcing rib 1311 and the second reinforcing rib 1312 can improve the rigidity of the bottom wall 13. The shapes of the first reinforcing rib 1311 and the second reinforcing rib 1312 are not limited. The shapes of the first reinforcing rib 1311 and the second reinforcing rib 1312 can be a rectangular parallelepiped or a triangular prism, etc. The shapes of the first reinforcing rib 1311 and the second reinforcing rib 1312 can be the same or different. The number of the first reinforcing rib 1311 and the number of the second reinforcing rib 1312 can be single or multiple.

[0085] When the surface of the bottom wall 13 is a plane, the first direction X and the second direction Y are any directions parallel to the surface of the bottom wall 13. For example, when the shape of the surface of the bottom wall 13 is a polygon, the first direction X may be parallel to the extension direction of one of the sides of the bottom wall 13, and the second direction Y intersects with the first direction X; or the first direction X may not be parallel to the extension direction of any one of the sides of the bottom wall 13, and the second direction Y intersects with the first direction X.

[0086] In the embodiment of the present application, the second direction Y may be perpendicular to the first direction X; or the second direction Y may intersect with the first direction X but not perpendicular, for example, the angle between the second direction Y and the first direction X is greater than or equal to 80° and less than 90°.

[0087] In some embodiments of the present application, the first reinforcing rib 1311 and the second reinforcing rib 1312 may not be connected to the side wall 12 .

[0088] In some embodiments of the present application, one end of the first reinforcing rib 1311 is connected to the side wall 12 , and the other end of the first reinforcing rib 1311 is not connected to the side wall 12 .

[0089] In some embodiments of the present application, one end of the second reinforcing rib 1312 is connected to the side wall 12 , and the other end of the second reinforcing rib 1312 is not connected to the side wall 12 .

[0090] In some embodiments of the present application, both ends of the first reinforcing rib 1311 are connected to the side wall 12 , one end of the second reinforcing rib 1312 is connected to the side wall 12 , and the other end of the second reinforcing rib 1312 is not connected to the side wall 12 .

[0091] In some other embodiments of the present application, both ends of the first reinforcing rib 1311 and both ends of the second reinforcing rib 1312 are connected to the side wall 12 .

[0092] In some embodiments of the present application, there may be various connection relationships between the first reinforcing ribs 1311 and the second reinforcing ribs 1312. For example, the first reinforcing ribs 1311 are connected to at least one second reinforcing rib 1312, and the second reinforcing ribs 1312 are connected to at least one first reinforcing rib 1311; or the first reinforcing ribs 1311 and the second reinforcing ribs 1312 are not connected; or some first reinforcing ribs 1311 are connected to at least one second reinforcing rib 1312, and other first reinforcing ribs 1311 and the second reinforcing ribs 1312 are not connected.

[0093] In an embodiment of the present application, a first reinforcing rib 1311 and a second reinforcing rib 1312 having different extension directions are provided, so that the rigidity of the bottom wall 13 can be increased from different directions, thereby increasing the overall strength of the box body 10. The first reinforcing rib 1311 and the second reinforcing rib 1312 can be integrally formed with other parts of the bottom wall 13, and the first reinforcing rib 1311 and the second reinforcing rib 1312 can also be welded to the cast part of the bottom wall 13, with a simple structure and flexible processing methods.

[0094] According to some embodiments of the present application, see Figure 2 and Figure 6 The first support structure 131 includes a plurality of first reinforcing ribs 1311 and a plurality of second reinforcing ribs 1312. The plurality of first reinforcing ribs 1311 are arranged at intervals along the second direction Y, and the plurality of second reinforcing ribs 1312 are arranged at intervals along the first direction X. Both opposite ends of the first reinforcing ribs 1311 along the first direction X are connected to the side wall 12. For the second reinforcing rib 1312 located between any two adjacent first reinforcing ribs 1311, one end of the second reinforcing rib 1312 along the second direction Y is connected to one of the two adjacent first reinforcing ribs 1311, and the other end of the second reinforcing rib 1312 along the second direction Y is a free end; for the second reinforcing rib 1312 located between the first reinforcing rib 1311 and the side wall, one end of the second reinforcing rib 1312 along the second direction Y is connected to the first reinforcing rib 1311, and the other end of the second reinforcing rib 1312 along the second direction Y is connected to the side wall. The heat exchange inlet 141 and the heat exchange outlet 142 are both connected to the gap between the free end of the second reinforcing rib 1312 and the first reinforcing rib 1311 .

[0095] In some embodiments, the connection method between the first reinforcing rib 1311 and the second reinforcing rib 1312 and the side wall 12 includes but is not limited to welding connection, adhesive connection, rivet connection, or integral molding. The connection method between the second reinforcing rib 1312 and the side wall 12 can be the same as or different from the connection method between the first reinforcing rib 1311 and the side wall 12.

[0096] The connection method between one end of the plurality of second reinforcing ribs 1312 and two adjacent first reinforcing ribs 1311 includes but is not limited to welding connection, adhesive connection, or integral molding. In some embodiments, one end of the plurality of second reinforcing ribs 1312 can be connected to the same first reinforcing rib 1311. In other embodiments, one end of the plurality of second reinforcing ribs 1312 can be connected to different first reinforcing ribs 1311. The free end refers to the other end of the second reinforcing rib 1312 that is not connected to other structures or is not constrained by other structures.

[0097] In some embodiments, there may be more than one heat exchange inlet 141 and more than one heat exchange outlet 142. In some embodiments, the heat exchange inlet 141 and the heat exchange outlet 142 may be located on the side walls 12 of the housing 10 in opposite directions to form a heat exchange channel 14 that allows gas to flow in one direction, which is beneficial to improving heat exchange efficiency.

[0098] For example, see Figure 2 and Figure 6 It can be understood that, along the first direction X, a main channel ( Figure 2 and Figure 6 (not shown), the inflowing gas can flow better in the main channel, thereby enhancing the heat exchange efficiency. In some embodiments, the heat exchange inlet 141 and the heat exchange outlet 142 can be respectively arranged on the two side walls 12 along the second direction Y, wherein the heat exchange inlet 141 and the heat exchange outlet 142 are respectively located at both ends of the main channel, so that the gas outside the box 10 can directly flow into the main channel through the heat exchange inlet 141 and flow out from the heat exchange outlet 142, thereby accelerating the flow speed of the gas in the heat exchange channel 14, thereby enhancing the heat exchange efficiency.

[0099] In the embodiment of the present application, along the second direction Y, there is a gap between the free ends of two adjacent second reinforcing ribs 1312 , so that gas can pass smoothly between two adjacent first reinforcing ribs 1311 , which is beneficial to improving the heat exchange efficiency of the battery cell 30 .

[0100] According to some embodiments of the present application, for the second reinforcing rib 1312 located between two adjacent first reinforcing ribs 1311 , one end of the second reinforcing rib 1312 along the second direction is connected to the middle portion of the same first reinforcing rib 1311 .

[0101] That is to say, between two adjacent first reinforcing ribs 1311 , one ends of the plurality of second reinforcing ribs 1312 are all connected to the same first reinforcing rib 1311 , and a gap exists between the free end of the second reinforcing rib 1312 and another first reinforcing rib 1311 .

[0102] In some embodiments, the gap between the free ends of multiple second reinforcing ribs 1312 and another first reinforcing rib 1311 can form a channel extending along the first direction X, which can reduce the obstruction to the flow of gas in the heat exchange channel 14 to a certain extent, increase the flow speed of the gas, and allow more gas to exchange heat with the battery cell 30 in the same time, thereby improving the heat exchange efficiency.

[0103] In some embodiments of the present application, the lengths of the second reinforcing ribs 1312 between two adjacent first reinforcing ribs 1311 may be different. In other embodiments of the present application, the lengths of the second reinforcing ribs 1312 between two adjacent first reinforcing ribs 1311 may be the same.

[0104] For example, see Figure 6 The lengths of the plurality of second reinforcing ribs 1312 located between two adjacent first reinforcing ribs 1311 are the same, and the extension directions of the plurality of second reinforcing ribs 1312 are parallel to each other, and the extension direction of the second reinforcing ribs 1312 is perpendicular to the extension direction of the first reinforcing ribs 1311 .

[0105] In an embodiment of the present application, one end of a plurality of second reinforcing ribs 1312 between two adjacent first reinforcing ribs 1311 are connected to the middle part of the same first reinforcing rib 1311. This can reduce the obstruction of the structure of the bottom wall 13 to the gas flow to a certain extent, which is beneficial to increasing the flow speed of the gas in the heat exchange channel 14, so that more gas can exchange heat with the battery cell 30 in the same time, thereby improving the stability of the battery.

[0106] According to some embodiments of the present application, the first supporting structure 131 also includes a third reinforcing rib 1313, which is located between two adjacent first reinforcing ribs 1311, and one end of the third reinforcing rib 1313 along the second direction Y is connected to the other first reinforcing rib 1311 of the two adjacent first reinforcing ribs 1311, and the other end of the third reinforcing rib 1313 along the second direction Y is a free end, and the free ends of the second reinforcing ribs 1312 correspond one-to-one to the free ends of the third reinforcing rib 1313, and are spaced along the second direction Y.

[0107] That is, the third reinforcing rib 1313 and the second reinforcing rib 1312 are respectively connected to two different adjacent first reinforcing ribs 1311. In some embodiments, the length of the third reinforcing rib 1313 along the second direction Y is less than the length of the second reinforcing rib 1312 along the second direction Y.

[0108] In some embodiments, the number of the third reinforcing ribs 1313 may be one or more. In some embodiments, the plurality of third reinforcing ribs 1313 located between two adjacent first reinforcing ribs 1311 may be arranged at intervals along the first direction X. Figure 6 , multiple third reinforcing ribs 1313 can be evenly spaced along the first direction X.

[0109] The free end of the third reinforcing rib 1313 refers to an end that is not connected to or constrained by other structures. In some embodiments, the free end of the third reinforcing rib 1313 and the free end of the second reinforcing rib 1312 may be spaced the same or different distances apart along the second direction.

[0110] In the embodiment of the present application, the third reinforcing rib 1313 can be connected to the first reinforcing rib 1311 that is not connected to the second reinforcing rib 1312 , thereby strengthening the rigidity of the bottom wall 13 .

[0111] According to some embodiments of the present application, Figure 7 for Figure 4 Schematic diagram of the cross section of the AA surface. Figure 8 for Figure 7 A partial enlarged view of point B in the middle. Fig. 9 A cross-sectional schematic diagram of another heat exchange assembly and a box body provided in an embodiment of the present application, Fig.10 for Fig. 9 The enlarged view of the part at C in the middle, see Figures 6 to 10 The box body 10 also includes a first boss 15, which is connected to the bottom wall 13 and protrudes toward the heat exchange channel 14. The first boss 15 is connected to the first supporting structure 131. Along the third direction Z, the height H1 of the first supporting structure 131 is less than the height H2 of the first boss 15. The third direction Z intersects with the surface of the bottom wall 13, and the heat exchange component 20 is connected to the first boss 15.

[0112] The first boss 15 can provide installation and support for the heat exchange assembly 20 . The first boss 15 can be in various shapes. For example, the first boss 15 can be a frustum or a prism.

[0113] There are many ways to connect the heat exchange assembly 20 and the first boss 15, for example, the heat exchange assembly 20 and the first boss 15 can be connected by welding or bonding. There are many ways to connect the first boss 15 and the first support structure 131, for example, the first boss 15 and the first support structure 131 can be connected by welding, or the first boss 15 and the first support structure 131 can be integrally formed.

[0114] The number of the first bosses 15 may be one or more, and the arrangement of the plurality of first bosses 15 may be set according to requirements. For example, the plurality of first bosses 15 may be arranged at intervals or in contact with each other.

[0115] In the embodiment of the present application, along the third direction Z, the height H1 of the first support structure 131 is less than the height H2 of the first boss 15 , that is, when the heat exchange assembly 20 is connected to the first boss 15 , the heat exchange assembly 20 does not contact the first support structure 131 .

[0116] Exemplarily, the difference between H2 and H1 satisfies the following range: 0.5 mm ≤ H2 - H1 ≤ 1 mm.

[0117] In an embodiment of the present application, the third direction Z may be perpendicular to the first direction X and the second direction Y; or the third direction Z intersects with the first direction X and the second direction Y but is not perpendicular, for example, the angle between the third direction Z and the first direction X is greater than or equal to 80° and less than 90°, and the angle between the third direction Z and the second direction Y is greater than or equal to 80° and less than 90°.

[0118] In an embodiment of the present application, the first boss 15 provides installation and support for the heat exchange assembly 20 and the battery cell 30, thereby improving the stability of the heat exchange assembly 20. At the same time, after the first boss 15 and the heat exchange assembly 20 are connected, the heat exchange assembly 20 does not contact the first support structure 131, and the gap between the heat exchange assembly 20 and the first support structure 131 is used to set the heat exchange channel 14.

[0119] According to some embodiments of the present application, see Figure 2 and Figure 6 The bottom wall 13 includes a plurality of first bosses 15 , which are arranged in an array in the accommodating cavity 11 , and any two adjacent first bosses 15 are spaced apart from each other.

[0120] In some embodiments of the present application, the first bosses 15 are arranged in a rectangular array in the accommodating cavity 11 .

[0121] In some embodiments of the present application, the first bosses 15 are arranged in an equidistant rectangular array in the accommodating cavity 11. For example, see Figure 6 The first bosses 15 are arranged in a rectangular array of 4 rows and 5 columns.

[0122] In the embodiment of the present application, a plurality of first bosses 15 are distributed in an array and evenly distributed in the accommodating cavity 11 , and the connection between the heat exchange component 20 and the first bosses 15 can better fix the heat exchange component 20 .

[0123] According to some embodiments of the present application, Fig.11 This is a schematic diagram of the structure of a box provided in an embodiment of the present application when viewed from above, see Figures 9 to 11 A surface of the first boss 15 facing away from the accommodating cavity 11 has a groove 151 , and an opening of the groove 151 passes through the surface of the bottom wall 13 facing away from the accommodating cavity 11 .

[0124] The groove 151 may be in various shapes with one end open. For example, the groove 151 may be a prism or a frustum with one end open. The open end of the groove 151 is located on a side of the groove 151 away from the accommodating cavity 11 .

[0125] In some embodiments of the present application, the shape of the groove 151 is similar to that of the first boss 15 .

[0126] In the embodiment of the present application, providing the groove 151 can appropriately reduce the weight of the box body 10 .

[0127] According to some embodiments of the present application, the box body 10 further includes a second supporting structure 16 , which is located in the groove 151 and connected to the groove 151 .

[0128] The second supporting structure 16 can improve the rigidity of the bottom wall 13 . The second supporting structure 16 can be made of a variety of materials, for example, the second supporting structure 16 can be made of iron, aluminum, carbon fiber material, etc.

[0129] The second support structure 16 may be in various shapes, for example, the second support structure 16 may be in a rectangular parallelepiped or a cylinder.

[0130] There are many ways to connect the second support structure 16 and the groove 151. For example, the second support structure 16 and the groove 151 can be connected by welding, or the second support structure 16 and the groove 151 can be integrally formed.

[0131] In the embodiment of the present application, the second support structure 16 located in the groove 151 can increase the rigidity of the bottom wall 13 , thereby improving the rigidity of the bottom wall 13 .

[0132] According to some embodiments of the present application, see Figure 5 , Figure 7 and Figure 8 The heat exchange assembly 20 includes a first heat exchange plate 21 . The first heat exchange plate 21 is located in the accommodating cavity 11 . The first heat exchange plate 21 is connected to the side wall 12 .

[0133] The first heat exchange plate 21 may exchange heat with the battery cells 30 . The first heat exchange plate 21 may exchange heat with the gas flowing into the heat exchange channel 14 , thereby adjusting the temperature of the battery cells 30 .

[0134] In other embodiments of the present application, the first heat exchange plate 21 may be made of a variety of materials, for example, the first heat exchange plate 21 may be made of aluminum, copper, or alumina ceramics.

[0135] In the embodiment of the present application, the first heat exchange plate 21 may be disposed in contact with the battery cell 30 , and the first heat exchange plate 21 may better absorb and transfer the heat of the battery cell 30 .

[0136] The first heat exchange plate 21 and the side wall 12 can be connected in various ways. For example, the first heat exchange plate 21 can be bonded to the side wall 12, or the first heat exchange plate 21 can be welded to the side wall 12, or the first heat exchange plate 21 can be connected to the side wall 12 by bolts, etc.

[0137] The first heat exchange plate 21 can exchange heat with the battery cell 30, and the first heat exchange plate 21 can also exchange heat with the gas flowing into the heat exchange channel 14, so as to adjust the temperature of the battery cell 30. The first heat exchange plate 21 can reduce the possibility of impurities such as water vapor in the external gas contacting the battery cell 30 to a certain extent, thereby reducing the impact on the battery. In addition, the first heat exchange plate 21 has a large contact area with the gas entering the box body 10, thereby improving the heat exchange efficiency, better adjusting the temperature of the battery, and improving the stability of the battery.

[0138] According to some embodiments of the present application, see Fig. 9 and Fig.10 The heat exchange assembly 20 also includes a second heat exchange plate 22, which is located in the accommodating cavity 11. The second heat exchange plate 22 and the first heat exchange plate 21 are stacked along the third direction Z. The second heat exchange plate 22 is located on the side of the first heat exchange plate 21 away from the battery cell 30. The third direction Z intersects with the surface of the bottom wall 13. The second heat exchange plate 22 has a protrusion protruding toward the heat exchange channel 14 so that a circulation channel 23 is formed between the second heat exchange plate 22 and the first heat exchange plate 21.

[0139] That is, the first heat exchange plate 21 and the second heat exchange plate 22 are in contact and stacked. For example, the third direction Z may be perpendicular to the surface of the bottom wall 13. The circulation channel 23 may have various shapes, for example, the circulation channel 23 may have a rectangular parallelepiped or other quadrangular prisms.

[0140] In some embodiments, materials with higher specific heat capacity, such as water or ethanol, are stored in the circulation channel 23, which can transfer the temperature of the first heat exchange plate 21 to the second heat exchange plate 22 more quickly, and the second heat exchange plate 22 is heat-exchanged by the gas flowing through the heat exchange channel 14, thereby adjusting the temperature of the battery cell 30 and improving the heat exchange efficiency of the battery cell 30.

[0141] In the embodiment of the present application, compared with the first heat exchange plate 21 , by providing the second heat exchange plate 22 with a protruding structure, the contact area between the heat exchange assembly 20 and the gas flowing through the heat exchange channel 14 can be increased, thereby improving the heat exchange effect on the battery cell 30 .

[0142] According to some embodiments of the present application, the heat exchange inlet 141 and the heat exchange outlet 142 are both located on the side wall 12 .

[0143] In some embodiments of the present application, the heat exchange channel 14 runs through two opposite sides of the side wall, and the heat exchange channel 14 is connected to the heat exchange inlet 141 and the heat exchange outlet 142 .

[0144] In an embodiment of the present application, the heat exchange inlet 141 and the heat exchange outlet 142 are both located on the side wall 12, so that a one-way flow channel can be formed, so that the gas flow speed in the heat exchange channel 14 is faster, so that more gas can exchange heat with the heat exchange component 20 per unit time, thereby improving the heat exchange efficiency and improving the temperature stability of the battery.

[0145] According to some embodiments of the present application, see Fig.10 The side wall 12 includes a second boss 121 protruding toward the heat exchange component 20 . The second boss 121 surrounds the heat exchange component 20 , and the heat exchange component 20 is sealed and connected to the second boss 121 .

[0146] The sealed connection means that after the second boss 121 is connected to the heat exchange assembly 20, the second boss 121, the heat exchange assembly 20 and the side wall 12 form an enclosed space, and the battery cell 30 is located in the enclosed space. There is no gas exchange between the battery cell 30 and the heat exchange channel 14, thereby maintaining the air tightness of the enclosed space where the battery cell 30 is located.

[0147] In some embodiments, the sealing connection between the heat exchange component 20 and the second boss 121 includes, but is not limited to, using sealant, tape, or welding.

[0148] In an embodiment of the present application, the heat exchange assembly 20 can be sealed and connected to the side wall 12 through the second boss 121, which is beneficial to maintaining the airtightness of the space where the battery cell 30 is located, reducing the possibility of impurities brought into the flowing gas in the heat exchange channel 14 coming into contact with the battery cell 30, and improving the reliability and safety of battery use.

[0149] An embodiment 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.

[0150] The electrical device may refer to the relevant description in the above embodiments, which will not be described again here.

[0151] The electrical device has the beneficial effects of the battery provided in the embodiments of the present application. For details, please refer to the specific description of the battery in the above embodiments, which will not be repeated here.

[0152] The embodiment of the present application provides a battery. The battery includes a housing 10, a heat exchange assembly 20 and a battery cell 30. The housing 10 includes a side wall 12 and a bottom wall 13 surrounding a receiving cavity 11. The heat exchange assembly 20 is located in the receiving cavity 11, and the heat exchange assembly 20 is connected to the housing 10. There is a gap between the heat exchange assembly 20 and the bottom wall 13 so that the heat exchange assembly 20 and the bottom wall 13 form a heat exchange channel 14. The side wall 12 has a heat exchange inlet 141 and a heat exchange outlet 142, and the heat exchange inlet 141 and the heat exchange outlet 142 are both connected to the heat exchange channel 14. The battery cell 30 is located on the side of the heat exchange assembly 20 away from the bottom wall 13.

[0153] The bottom wall 13 includes a first supporting structure 131 protruding toward the heat exchange channel 14 . The heat exchange assembly 20 is located on a side of the first supporting structure 131 away from the bottom wall 13 . There is a gap between the first supporting structure 131 and the heat exchange assembly 20 .

[0154] The first support structure 131 includes a plurality of first reinforcing ribs 1311 and a plurality of second reinforcing ribs 1312. The plurality of first reinforcing ribs 1311 are arranged at intervals along the second direction Y, and the plurality of second reinforcing ribs 1312 are arranged at intervals along the first direction X. Both opposite ends of the first reinforcing ribs 1311 along the first direction X are connected to the side wall 12. For the second reinforcing rib 1312 located between any two adjacent first reinforcing ribs 1311, one end of the second reinforcing rib 1312 along the second direction Y is connected to one of the two adjacent first reinforcing ribs 1311. The first reinforcing rib 1311 is connected, and the other end of the second reinforcing rib 1312 along the second direction Y is a free end; for the second reinforcing rib 1312 located between the first reinforcing rib 1311 and the side wall 12, one end of the second reinforcing rib 1312 along the second direction Y is connected to the first reinforcing rib 1311, and the other end of the second reinforcing rib 1312 along the second direction Y is connected to the side wall 12; wherein the heat exchange inlet 141 and the heat exchange outlet 142 are both connected to the gap between the free end of the second reinforcing rib 1312 and the first reinforcing rib 1311. For the second reinforcing rib 1312 located between two adjacent first reinforcing ribs 1311, one end of the second reinforcing rib 1312 along the second direction Y is connected to the middle part of the same first reinforcing rib 1311.

[0155] The first supporting structure 131 also includes a third reinforcing rib 1313, which is located between two adjacent first reinforcing ribs 1311, and one end of the third reinforcing rib 1313 along the second direction Y is connected to the other first reinforcing rib 1311 of the two adjacent first reinforcing ribs 1311, and the other end of the third reinforcing rib 1313 along the second direction Y is a free end, and the free end of the second reinforcing rib 1312 corresponds one-to-one to the free end of the third reinforcing rib 1313 and is spaced along the second direction Y.

[0156] The housing 10 further includes a first boss 15, which is connected to the bottom wall 13 and protrudes toward the heat exchange channel 14, and is connected to the first support structure 131. Along the third direction Z, the height of the first support structure 131 is less than the height of the first boss 15, and the third direction Z intersects with the surface of the bottom wall 13, and the heat exchange assembly 20 is connected to the first boss 15. The bottom wall 13 includes a plurality of first bosses 15, and the plurality of first bosses 15 are arranged in an array in the accommodating cavity 11, and any two adjacent first bosses 15 are spaced from each other. The first boss 15 has a groove 151 on one side surface facing away from the accommodating cavity 11, and the opening of the groove 151 passes through the side surface of the bottom wall 13 facing away from the accommodating cavity 11. The housing 10 further includes a second support structure 16, which is located in the groove 151, and is connected to the groove 151.

[0157] The heat exchange assembly 20 includes a first heat exchange plate 21 and a second heat exchange plate 22. The first heat exchange plate 21 is located in the accommodating cavity 11, and the first heat exchange plate 21 is connected to the side wall 12. The second heat exchange plate 22 is located in the accommodating cavity 11, and the second heat exchange plate 22 and the first heat exchange plate 21 are stacked along the third direction Z. The second heat exchange plate 22 is located on the side of the first heat exchange plate 21 away from the battery cell 30, and the third direction Z intersects with the surface of the bottom wall 13. The second heat exchange plate 22 has a protrusion protruding toward the heat exchange channel 14 so that a circulation channel 23 is formed between the second heat exchange plate 22 and the first heat exchange plate 21.

[0158] The side wall 12 includes a second boss 121 protruding toward the heat exchange assembly 20 . The second boss 121 surrounds the heat exchange assembly 20 . The heat exchange assembly 20 is sealed and connected to the second boss 121 .

[0159] 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A battery, characterized in that: The battery comprises: The box body (10) comprises a side wall (12) and a bottom wall (13) which surround and form a receiving cavity (11); a heat exchange component (20) located in the accommodating cavity (11), the heat exchange component (20) being connected to the housing (10), and a gap being provided between the heat exchange component (20) and the bottom wall (13), so that the heat exchange component (20) and the bottom wall (13) form a heat exchange channel (14); A battery cell (30) located on a side of the heat exchange assembly (20) facing away from the bottom wall (13); Wherein, at least one of the side wall (12) and the bottom wall (13) has a heat exchange inlet (141), and at least one of the side wall (12) and the bottom wall (13) has a heat exchange outlet (142), and both the heat exchange inlet (141) and the heat exchange outlet (142) are in communication with the heat exchange channel (14).

2. The battery according to claim 1, characterized in that The bottom wall (13) comprises a first supporting structure (131) protruding toward the heat exchange channel (14), the heat exchange component (20) is located on a side of the first supporting structure (131) away from the bottom wall (13), and there is a gap between the first supporting structure (131) and the heat exchange component (20).

3. The battery according to claim 2, characterized in that The first supporting structure (131) comprises: A first reinforcing rib (1311) extending along a first direction, wherein the first direction is parallel to the surface of the bottom wall (13); The second reinforcing rib (1312) extends along a second direction, the second direction is parallel to the surface of the bottom wall (13), and the second direction intersects with the first direction.

4. The battery according to claim 3, characterized in that The first supporting structure (131) comprises a plurality of the first reinforcing ribs (1311) and a plurality of the second reinforcing ribs (1312), the plurality of the first reinforcing ribs (1311) being arranged at intervals along the second direction, the plurality of the second reinforcing ribs (1312) being arranged at intervals along the first direction, and the first reinforcing ribs (1311) being connected to the side wall (12) at opposite ends along the first direction; For the second reinforcing rib (1312) located between any two adjacent first reinforcing ribs (1311), one end of the second reinforcing rib (1312) along the second direction is connected to one of the two adjacent first reinforcing ribs (1311), and the other end of the second reinforcing rib (1312) along the second direction is a free end; For the second reinforcing rib (1312) located between the first reinforcing rib (1311) and the side wall (12), one end of the second reinforcing rib (1312) along the second direction is connected to the first reinforcing rib (1311), and the other end of the second reinforcing rib (1312) along the second direction is connected to the side wall (12); Wherein, the heat exchange inlet (141) and the heat exchange outlet (142) are both connected to the gap between the free end of the second reinforcing rib (1312) and the first reinforcing rib (1311).

5. The battery according to claim 4, characterized in that For the second reinforcing rib (1312) located between two adjacent first reinforcing ribs (1311), one end of the second reinforcing rib (1312) along the second direction is connected to the middle part of the same first reinforcing rib (1311).

6. The battery according to claim 4, characterized in that The first supporting structure (131) further comprises: A third reinforcing rib (1313) is located between two adjacent first reinforcing ribs (1311); one end of the third reinforcing rib (1313) along the second direction is connected to the other first reinforcing rib (1311) of the two adjacent first reinforcing ribs (1311); the other end of the third reinforcing rib (1313) along the second direction is a free end; the free end of the second reinforcing rib (1312) corresponds to the free end of the third reinforcing rib (1313) one by one and are spaced apart along the second direction.

7. The battery according to any one of claims 2 to 6, characterized in that The box (10) further comprises: A first boss (15) is connected to the bottom wall (13), and the first boss (15) protrudes toward the heat exchange channel (14). The first boss (15) is connected to the first support structure (131). Along a third direction, a height H1 of the first support structure (131) is less than a height H2 of the first boss (15). The third direction intersects with a surface of the bottom wall (13). The heat exchange assembly (20) is connected to the first boss (15).

8. The battery according to claim 7, characterized in that The bottom wall (13) comprises a plurality of the first bosses (15), the plurality of the first bosses (15) being arranged in an array in the accommodating cavity (11), and any two adjacent first bosses (15) being spaced apart from each other.

9. The battery according to claim 7, characterized in that A surface of the first boss (15) on one side facing away from the accommodating cavity (11) has a groove (151), and an opening of the groove (151) passes through a surface of the bottom wall (13) on one side facing away from the accommodating cavity (11).

10. The battery according to claim 9, characterized in that The box (10) further comprises: The second supporting structure (16) is located in the groove (151), and the second supporting structure (16) is connected to the groove (151).

11. The battery according to any one of claims 1 to 6, characterized in that The heat exchange component (20) comprises: A first heat exchange plate (21) is located in the accommodating cavity (11), and the first heat exchange plate (21) is connected to the box body (10).

12. The battery according to claim 11, characterized in that The heat exchange component (20) further comprises: A second heat exchange plate (22) is located in the accommodating cavity (11), the second heat exchange plate (22) and the first heat exchange plate (21) are stacked along a third direction, the second heat exchange plate (22) is located on a side of the first heat exchange plate (21) away from the battery cell (30), the third direction intersects with a surface of the bottom wall (13), and the second heat exchange plate (22) has a protrusion protruding toward the heat exchange channel (14) so ​​that a circulation channel (23) is formed between the second heat exchange plate (22) and the first heat exchange plate (21).

13. The battery according to any one of claims 1 to 6, characterized in that The heat exchange inlet (141) and the heat exchange outlet (142) are both located on the side wall (12).

14. The battery according to any one of claims 1 to 6, characterized in that The side wall (12) comprises a second boss (121) protruding toward the heat exchange component (20), the second boss (121) surrounds the heat exchange component (20), and the heat exchange component (20) is sealedly connected to the second boss (121).

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

Images