Battery case, battery device, and electric device

Abstract

The application discloses a battery box, a battery device and a power utilization equipment. The battery device comprises the battery box and a battery cell. The battery box comprises a box body and a box cover. The box body comprises a box bottom plate, box side plates and a box end plate. Two box side plates are respectively arranged on two sides of the box bottom plate in a first direction. At least one of the two box side plates is configured as an integrated extrusion forming structure extruded along a second direction intersecting the first direction. The box bottom plate, the box side plates and the box end plate are configured to form a containing groove. The box cover is covered on an opening of the containing groove and is configured to form a containing cavity together with the containing groove. The battery cell is arranged in the containing cavity. The box bottom plate has an extrusion cavity. The extrusion cavity is configured as a heat exchange channel. The heat exchange channel is configured to conduct a heat exchange medium to exchange heat with the battery cell. The technical scheme can reduce the welding amount required by the battery device and reduce the structural deformation or cracks of the battery device caused by welding stress.

Description

Technical Field

[0001] This application relates to the field of battery device technology, and in particular to a battery box, battery device, and electrical equipment. Background Technology

[0002] The battery devices in related technologies have a large number of components, resulting in a significant amount of welding work. This can easily lead to improper welding, generating welding stress that can cause structural deformation or cracks in the battery device. Utility Model Content

[0003] The main objective of this application is to provide a battery device that reduces the amount of welding required and minimizes defects such as structural deformation or cracks caused by welding stress due to improper welding.

[0004] To achieve the above objectives, the battery device proposed in this application includes a battery box and battery cells. The battery box includes a box body and a box cover. The box body includes a bottom plate, two side plates, and two end plates. The two side plates are respectively disposed on both sides of the bottom plate in a first direction, and at least one of them is configured with the bottom plate as an integrally extruded structure extruded in a second direction, the second direction intersecting the first direction. The two end plates are disposed on both sides of the bottom plate in the second direction. The bottom plate, the two side plates, and the two end plates are configured to enclose a receiving groove. The box cover is closed on the opening of the receiving groove and is configured with the receiving groove to enclose a receiving cavity. The battery cells are disposed in the receiving cavity. The bottom plate has an extrusion cavity, which is configured as a heat exchange channel. The heat exchange channel is configured to conduct a heat exchange medium for heat exchange with the battery cells.

[0005] The battery device in this application integrates the bottom plate and at least one of the two side plates of the battery box into a single extruded structure, eliminating the need for welding between the bottom plate and the side plate. Simultaneously, the extrusion cavity within the bottom plate forms a heat exchange channel, eliminating the need for an additional cold plate for heat exchange between the battery cells, thus simplifying the number of components and eliminating the need for welding the cold plate. Therefore, this solution, by integrally extruding the bottom plate and side plates with integrated heat exchange channels, significantly reduces the amount of welding required for the battery device, minimizing structural deformation or cracks caused by welding stress due to improper welding. This further meets the high safety and long lifespan performance requirements of battery devices used in complex operating conditions. Furthermore, the integral extrusion molding method, forming the heat exchange channel within the bottom plate through an extrusion cavity, also ensures a high level of sealing for the heat exchange channel.

[0006] In some embodiments, the box bottom plate includes a first sub-plate and a second sub-plate, which are arranged along a first direction; the first sub-plate and one of the two box side plates are integrally extruded and molded, and the second sub-plate and one of the two box side plates are integrally extruded and molded. Therefore, a smaller and simpler mold can be used to integrally extrude and mold the box bottom plate, improving the convenience of mold manufacturing.

[0007] In some embodiments, the heat exchange channel includes a plurality of interconnected first sub-channels, which are arranged along a first direction and extend along a second direction. The multiple first sub-channels are respectively distributed on a first sub-plate and a second sub-plate, with the connection between the first sub-plate and the second sub-plate located between two adjacent first sub-channels. This reduces the impact of separating the first sub-plate and the second sub-plate on the sealing performance of the first sub-channels, thereby reducing the possibility of leakage at the connection between the first sub-plate and the second sub-plate.

[0008] In some embodiments, the first sub-plate and the second sub-plate are welded together. This improves the stability of the connection between the first and second sub-plates, enhances the sealing of the heat exchange channel, and simplifies the structural configuration of each sub-plate.

[0009] In some embodiments, in the first direction, the distance between the two box side plates is defined as D1, and the distance between the box side plate connected to the first sub-plate and the end of the first sub-plate near the second sub-plate is defined as D2, satisfying the relationship: 0.4≤D2 / D1≤0.6. This allows the molds for molding the first and second sub-plates to be designed to be smaller in size and simpler in structure, thus facilitating manufacturing.

[0010] In some embodiments, the extrusion cavity is open at both ends in the second direction, and a plurality of first partition plates arranged side by side along the first direction are provided inside the extrusion cavity to divide the extrusion cavity into a plurality of first sub-channels, which are connected to form a heat exchange channel. This simplifies the structure of the bottom plate and facilitates the formation of the heat exchange channel within the bottom plate using an integral extrusion molding process.

[0011] In some embodiments, the bottom plate of the battery case is defined to have a first end and a second end opposite to each other in a second direction. The battery case also includes a current collector that covers the opening at the first end. The current collector is provided with an inlet and an outlet, both of which are connected to the heat exchange channel. This allows the current collector to seal multiple first sub-channels at the first end and also to provide transitional connection between these multiple first sub-channels and the external circulation pipeline, enabling a single component to perform multiple functions and further simplifying the number of components in the battery device.

[0012] In some embodiments, the current collector is provided with mounting holes. This allows the current collector to further function as an external mounting connection for the battery device. This further eliminates the need for mounting brackets, thereby reducing the soldering work required for the battery device.

[0013] In some embodiments, the manifold extends along a first direction, with an inlet and an outlet located at opposite ends of the manifold in that direction, and a mounting hole positioned between the inlet and outlet. This facilitates the arrangement of the entire heat exchange channel from one end to the other along the first direction, improving the regularity of the flow path and thus enhancing the ease of integral molding of the bottom plate. Simultaneously, it ensures orderly flow of the heat exchange medium within the heat exchange channel, resulting in better fluidity and improved cooling of the individual battery cells within the battery box. Furthermore, positioning the mounting hole between the inlet and outlet allows for a more uniform distribution of the inlet, outlet, and mounting hole along the first direction on the manifold, improving the uniformity of strength across the manifold and consequently enhancing the stability of subsequent battery installation.

[0014] In some embodiments, the opening of the receiving groove is provided facing a third direction, the mounting hole extends along the third direction and penetrates both sides of the manifold in the third direction, and / or, both the inlet and outlet ports are located on the side of the manifold facing the opening of the receiving groove. Therefore, when installing the battery device on a vehicle, the screws can be directly fastened from top to bottom, thus improving the convenience of installing and removing the battery device. Furthermore, the mounting hole is located between the two inlet and outlet ports, ensuring that the connection between the battery device and the vehicle does not occupy space in the first direction of the battery device, i.e., the width direction, thus facilitating the installation of the battery device within a limited space.

[0015] In some embodiments, the manifold is provided with a first transition channel, the liquid inlet is connected to the first transition channel, and two adjacent first sub-channels correspond to and are connected in parallel with the first transition channel. This allows the heat exchange medium to enter the two adjacent sub-channels after passing through the first transition channel, thereby reducing the flow resistance of the heat exchange medium when entering the heat exchange channel and improving the flow effect of the heat exchange medium.

[0016] In some embodiments, a second partition plate is provided in the first transition channel to divide the first transition channel into two second sub-channels. One end of each of the two second sub-channels is connected in parallel and communicates with the liquid inlet, while the other end is respectively connected to the two adjacent first sub-channels. Thus, after the heat exchange medium enters the first transition channel, the second partition plate can divert the heat exchange medium, allowing it to flow more smoothly into the corresponding two first sub-channels through the two second sub-channels.

[0017] In some embodiments, the manifold is provided with a second transition channel, the liquid outlet is connected to the second transition channel, and two adjacent first sub-channels correspond to and are connected in parallel with the second transition channel. This improves the uniformity of the flow velocity and flow rate of the heat exchange medium at the inlet and outlet of the heat exchange channel, thereby enhancing the overall stability of the heat exchange medium flow.

[0018] In some embodiments, a third partition plate is provided in the second transition channel to divide the second transition channel into two third sub-channels; one end of each of the two third sub-channels is connected in parallel and communicates with the liquid outlet, while the other end is respectively connected to two adjacent first sub-channels. Thus, after the heat exchange medium flows out from the two adjacent first sub-channels, the second partition plate can divert the heat exchange medium, allowing it to enter the second transition channel more smoothly.

[0019] In some embodiments, the opening of the receiving groove is positioned facing a third direction upwards, and on a projection plane perpendicular to the third direction, both the inlet and outlet ports are located outside the projection of the receiving cavity. This allows the pipe fittings connecting the inlet and outlet ports to the inlet and outlet pipes in the external circulation pipeline to be located outside the battery box, thus avoiding space occupation inside the battery box while facilitating disassembly and maintenance.

[0020] In some embodiments, the bottom plate of the battery box has a mounting notch at one end, and the opening at the first end communicates with the mounting notch. The current collector is disposed at the mounting notch. This improves the compactness of the distribution between the current collector and the bottom plate, thereby reducing the overall volume of the battery box and improving the convenience of subsequent installation and arrangement within a limited space. Simultaneously, it increases the contact area between the current collector and the bottom plate, thus improving the convenience and stability of their connection.

[0021] In some embodiments, the current collector is inserted into the bottom plate of the casing. This increases the limiting constraint force between the current collector and the bottom plate, thereby improving the stability of the connection between the current collector and the bottom plate. This also improves the stability of subsequent battery installation when the current collector has integrated mounting holes.

[0022] In some embodiments, the bottom plate of the casing has a first annular groove on the inner side of the first end, and the opening of the first annular groove is configured as an opening at the first end, with a portion of the current collector accommodated within the first annular groove. This eliminates the need for a recessed structure on the current collector for insertion and mating, thereby improving the structural strength of the current collector. This further enhances the stability of subsequent battery installation when the current collector integrates mounting holes. Simultaneously, it simplifies the structure of the bottom plate, thus improving its manufacturing convenience.

[0023] In some embodiments, the manifold is welded to the bottom plate of the casing. This improves the stability of the connection between the manifold and the bottom plate, enhances the sealing of the heat exchange channel, and eliminates the need for a connection structure between the manifold and the bottom plate, thus simplifying their respective structural configurations.

[0024] In some embodiments, the manifold has two protrusions, with the inlet and outlet ports respectively located on the two protrusions. This allows the manifold to have a greater thickness at these locations, facilitating the installation of inlet and outlet ports with sufficient depth, thereby improving the convenience and stability of connection to pipe fittings or inlet and outlet pipes in external circulating cooling pipes.

[0025] In some embodiments, the bottom plate of the battery case is defined to have opposing first and second ends in a second direction, and the battery case further includes a sealing element that covers the opening at the second end. Thus, a single sealing element can seal multiple first sub-channels at the second end, thereby simplifying the number of components in the battery device by ensuring the heat exchange channels are sealed at the second end.

[0026] In some embodiments, the sealing element is inserted into the bottom plate of the enclosure. This increases the limiting constraint force between the sealing element and the bottom plate, thereby improving the stability of the connection between the sealing element and the bottom plate. It also increases the contact area between the two, thereby improving the sealing effect of the sealing element on the second end of the bottom plate.

[0027] In some embodiments, the bottom plate of the box has a second annular groove on the inner side of the second end, and the groove opening of the second annular groove is configured as an opening at the second end, with a portion of the sealing member inserted into the second annular groove. This simplifies the structure of the bottom plate and improves its manufacturing convenience.

[0028] In some embodiments, the sealing element is welded to the bottom plate of the tank. This improves the stability of the connection between the sealing element and the bottom plate, enhances the sealing performance of the heat exchange channel, and eliminates the need for a connection structure between the sealing element and the bottom plate, thereby simplifying their respective structural configurations.

[0029] In some embodiments, some of the multiple first sub-channels are connected in series, while others are connected in parallel. This allows for more diverse connections between the multiple first sub-channels, enabling the adoption of appropriate connection methods at different locations to adjust the flow rate and velocity of the heat exchange medium at those locations.

[0030] This application also proposes an electrical device including the aforementioned battery device.

[0031] This application also proposes a battery box, including a box body and a box cover. The box body includes a bottom plate, two side plates, and two end plates. The two side plates are respectively disposed on both sides of the bottom plate in a first direction, and at least one of them is configured with the bottom plate as an integrally extruded structure extruded along a second direction, the second direction intersecting the first direction. The two end plates are disposed on the bottom plate. The bottom plate, the two side plates, and the two end plates are configured to enclose a receiving groove. The box cover closes to the opening of the receiving groove and is configured with the receiving groove to enclose a receiving cavity. The bottom plate has an extrusion cavity, which is configured as a heat exchange channel. The heat exchange channel is configured to conduct a heat exchange medium for heat exchange with the battery cells located in the receiving cavity. Therefore, the amount of welding required for the battery device can be reduced, and defects such as structural deformation or cracks caused by welding stress due to improper welding can be minimized.

[0032] In some embodiments, the box bottom plate includes a first sub-plate and a second sub-plate, which are arranged along a first direction; the first sub-plate and one of the two box side plates are integrally extruded and molded, and the second sub-plate and one of the two box side plates are integrally extruded and molded. Therefore, a smaller and simpler mold can be used to mold the box bottom plate, improving the convenience of mold manufacturing.

[0033] In some embodiments, the heat exchange channel includes a plurality of interconnected first sub-channels, which are arranged along a first direction and extend along a second direction. The multiple first sub-channels are respectively distributed on a first sub-plate and a second sub-plate, with the connection between the first sub-plate and the second sub-plate located between two adjacent first sub-channels. And / or, the first sub-plate and the second sub-plate are welded together. This reduces the impact of separating the first sub-plate and the second sub-plate on the sealing performance of the first sub-channels, thereby reducing the possibility of leakage at the connection between the first sub-plate and the second sub-plate. Welding also improves the stability of the connection between the first sub-plate and the second sub-plate, enhances the sealing performance of the heat exchange channel, and simplifies the structural design of each of the first and second sub-plates.

[0034] In some embodiments, the extrusion cavity is open at both ends in the second direction, and a plurality of first partition plates arranged side by side along the first direction are provided inside the extrusion cavity to divide the cavity into a plurality of first sub-channels, which are connected to form a heat exchange channel. This simplifies the structure of the bottom plate and facilitates the formation of the heat exchange channel within the bottom plate using an integral molding process.

[0035] In some embodiments, the bottom plate of the battery box is defined to have a first end and a second end opposite to each other in a second direction. The battery box also includes a current collector that covers the opening at the first end. The current collector has an inlet and an outlet liquid interface, both of which are connected to the heat exchange channel. The current collector also has mounting holes. This allows the current collector to seal multiple first sub-channels at the first end and also to provide transitional connection between these multiple first sub-channels and the external circulation pipeline, enabling a single component to perform multiple functions and further simplifying the number of components in the battery device. Simultaneously, the mounting holes on the current collector allow it to further serve as an external mounting connection for the battery device. This further eliminates the need for mounting components, thereby reducing the welding work required for the battery device. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of one embodiment of the vehicle of this application; Figure 2 This is a schematic diagram of the structure of an embodiment of the battery device of this application; Figure 3 for Figure 2 Internal schematic diagram of the battery device; Figure 4 for Figure 2 A schematic diagram of the battery box without its cover; Figure 5 for Figure 4 An exploded structural diagram of the battery box; Figure 6 for Figure 5 Exploded structural diagram of the bottom plate of the middle box, the current collection component and the sealing component; Figure 7 for Figure 6 A magnified view of point A in the diagram; Figure 8 for Figure 4 A cross-sectional schematic diagram of the bottom plate of the middle box, the flow collector and the sealing component; Figure 9 for Figure 8 A magnified view of point B in the diagram; Figure 10 for Figure 8 A magnified view of point C in the diagram.

[0038] Explanation of icon numbers: 100. Battery assembly; 10. Battery box; 11. Box body; 111. Box bottom plate; 111a. Heat exchange flow channel; 111a1. First sub-flow channel; 1111. First sub-plate; 1113. Second sub-plate; 111b. Extrusion cavity; 1115. First partition plate; 111c. First end; 111d. Second end; 111e. Mounting notch; 111f. First annular groove; 111g. Second annular groove; 113. Box side plate; 115. Box end plate; 11a. Receiving groove; 13. 10a. Cover; 15. Collection chamber; 15a. Liquid inlet; 15b. Liquid outlet; 15c. Mounting hole; 15d. First transition channel; 15d1. Second sub-channel; 151. Second partition plate; 15e. Second transition channel; 15e1. Third sub-channel; 153. Third partition plate; 155. Protrusion; 17. Sealing component; 19. Mounting beam; 20. Battery cell; 30. Pipe connector; 1000. Vehicle; 200. Controller; 300. Motor.

[0039] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0041] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0042] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0044] Battery devices, which are devices used to store electrical energy, are widely used not only in energy storage power systems such as hydropower, thermal power, wind power and solar power plants, but also in electric vehicles such as electric bicycles, electric motorcycles, electric cars, rail trains and other fields.

[0045] The battery device may include a battery case and individual battery cells disposed within the battery case. The battery case may include a casing and a cover that fits over the casing to enclose a cavity for housing the individual battery cells. The individual battery cell is the smallest unit comprising the battery and typically includes a battery casing and an electrode assembly disposed within the battery casing. The electrode assembly is the component in the individual battery cell where the electrochemical reaction actually occurs, and may include a positive electrode, a negative electrode, and a separator located between them, formed by winding or stacking the positive electrode, negative electrode, and separator. The individual battery cell may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Furthermore, the individual battery cell may be cylindrical, flat, cuboid, or other shapes. In addition, the battery case may contain multiple individual battery cells, which may be connected in series, in parallel, or in a hybrid connection including both series and parallel connections.

[0046] Furthermore, the battery devices in related technologies have a large number of components. For example, a single battery box includes at least five components: a bottom plate, two side plates, and two end plates. Additionally, since individual battery cells generate heat during operation, a cooling plate is usually installed inside the box. Therefore, the bottom plate, side plates, end plates, and cooling plate need to be welded individually. Consequently, battery devices in related technologies involve a significant amount of welding work. Improper welding can easily lead to welding stress, which can cause structural deformation or cracks in the battery device. This is particularly problematic when battery devices are used in rail transit. Compared to ordinary vehicles, rail transit has a larger passenger capacity and higher speeds, and the battery devices must withstand high-frequency vibrations, impacts, and collisions over long periods, making the operating conditions extremely complex. In such conditions, structural deformation or cracks in the battery device can be amplified, ultimately affecting safety. Furthermore, rail transit systems have longer service life. For example, the service life of battery devices in ordinary vehicles is typically 5 to 8 years, while that in rail transit systems is usually 10 to 15 years or more. Therefore, the battery devices are required to have a long lifespan and be able to operate stably for an extended period. In other words, due to its complex operating conditions and long service life, rail transit places higher demands on the safety and lifespan of the battery devices used.

[0047] Therefore, based on the above considerations, in order to address the problem that battery devices in related technologies are prone to defects due to improper welding caused by extensive welding work, which leads to welding stress and makes it difficult to meet the high safety and long lifespan performance requirements of battery devices used in complex operating conditions, such as rail transit scenarios, this application proposes a novel battery device. This device innovatively integrates the bottom plate of the battery box and at least one of the two side plates into a single extrusion molding process. This eliminates the need for welding between the bottom plate and the side plates. Furthermore, the extrusion cavity within the bottom plate serves as a heat exchange channel, eliminating the need for an additional cold plate and thus reducing the possibility of battery device defects caused by welding stress due to improper welding.

[0048] Furthermore, it should be noted that the battery device proposed in this application can be applied to electrical devices to provide power to them. These electrical devices can be, but are not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, rail trains, ships, and spacecraft. Further, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., while spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0049] For ease of explanation, the following embodiments use a vehicle as an example of an electrical device according to an embodiment of this application.

[0050] Please refer to Figure 1 In one embodiment of this application, the vehicle 1000 can be a rail train, a fuel-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc. A battery device 100 is internally installed in the vehicle 1000, and the battery device 100 can be located at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0051] In one embodiment of this application, the battery device 100 can also serve 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, and can also be used to supply power to electrical appliances on the vehicle 1000.

[0052] Please refer to the reference. Figures 2 to 5In one embodiment of this application, the battery device 100 includes a battery case 10 and battery cells 20. The battery case 10 includes a case body 11 and a case cover 13. The case body 11 includes a bottom plate 111, two side plates 113, and two end plates 115. The two side plates 113 are respectively disposed on both sides of the bottom plate 111 in a first direction, and at least one of them is configured with the bottom plate 111 as an integrally extruded structure extruded along a second direction, the second direction intersecting the first direction; the two end plates 115 are disposed on the bottom plate 111. 1. On both sides in the second direction; the bottom plate 111, two side plates 113 and two end plates 115 are configured to form a receiving groove 11a, and the cover 13 covers the opening of the receiving groove 11a and is configured to form a receiving cavity 10a; the battery cell 20 is disposed in the receiving cavity 10a; the bottom plate 111 has an extrusion cavity 111b, the extrusion cavity 111b is configured as a heat exchange channel 111a, and the heat exchange channel 111a is configured to conduct heat exchange medium to exchange heat with the battery cell 20.

[0053] The battery box 10, through the accommodating cavity 10a formed by the box body 11 and the box cover 13, provides space for accommodating the battery cells 20, thus providing support and protection for the battery cells 20. The bottom plate 111 within the box body 11 is used to install and support the battery cells 20. Therefore, when the battery assembly 100 is in normal installation and use, the battery cells 20 can be installed on the upper surface of the bottom plate 111. A first direction can be the width direction of the battery assembly 100, with the two side plates 113 located on either side of the bottom plate 111 in the width direction and extending upwards. A second direction can be the length direction of the battery assembly 100, with the two end plates 115 located on either side of the bottom plate 111 in the length direction and extending upwards. The bottom plate 111, the two side plates 113, and the two end plates 115 together form an upward-facing accommodating groove 11a. The cover 13 can be fitted onto the upper end of the housing 11 to close the opening of the receiving groove 11a. The cover 13 can be a plate structure. In this case, the battery cell 20 can be completely housed within the housing 11. Alternatively, the cover 13 can be a hollow structure with one open end. In this case, the battery cell 20 can be partially housed within the housing 11, with the remaining portion housed within the cover 13. Furthermore, the connection between the housing 11 and the cover 13 can be a detachable connection, such as a threaded connection using screws or bolts, a snap-fit ​​connection, or a magnetic connection. Alternatively, the housing 11 and the cover 13 can be a non-detachable connection, such as an adhesive connection or a welded connection.

[0054] The fact that at least one of the bottom panel 111 and the two side panels 113 is an integral structure means that the bottom panel 111 and the side panels 113 can be manufactured using an integral molding process, so that they can be formed into a single unit during manufacturing. This integral molding process can be integral extrusion molding. Specifically, the bottom panel 111 and one side panel 113 can be an integral structure, or the bottom panel 111 and both side panels 113 can be an integral structure. Furthermore, the integral structure of the bottom panel 111 and the side panels 113 includes the case where the bottom panel 111 itself is an integral structure. Of course, this also includes the case where the bottom panel 111 is divided into two parts, a first sub-panel 1111 and a second sub-panel 1113, as described below. Furthermore, the end plate 115 may be connected only to the bottom plate 111, only to the side plate 113, or only to the collectors 15 or sealing members 17 at both ends of the bottom plate 111 in the second direction, as further described below. Alternatively, it may be connected to at least two of the bottom plate 111, the collectors 15 of the side plate 113, and the sealing members 17. Additionally, the connection of the end plate 115 may be achieved by welding to improve the stability of the connection and the sealing effect of the accommodating cavity 10a. Of course, adhesive bonding or other connection methods may also be used; this application does not limit the connection method of the end plate 115.

[0055] The heat exchange channel 111a can be connected to an external circulation pipeline to allow the entry of a heat exchange medium (e.g., water or oil) to achieve heat exchange and cooling of the battery cells 20 located inside the battery box 10. Of course, in some embodiments, the heat exchange medium can also be used to heat the battery cells 20; this application does not limit this. Since the bottom plate 111 is manufactured using an integral extrusion molding process, it has an extrusion cavity 111b inside. The heat exchange channel 111a can be formed through this extrusion cavity 111b, allowing the heat exchange channel 111a to be formed directly during the integral extrusion molding of the bottom plate 111, without the need for an additional cold plate. The cross-section of the heat exchange channel 111a, perpendicular to its extension direction, can be any shape, such as circular, rectangular, racetrack-shaped, or elliptical. Alternatively, the heat exchange channel 111a can be, as described below, comprise multiple first sub-channels 111a1 arranged side-by-side in one direction. Of course, the heat exchange channel 111a can also be a single cavity structure.

[0056] The battery cell 20 can be used to store electrical energy. The number of battery cells 20 can be one, or multiple. Multiple battery cells 20 can be connected in series, parallel, or a combination thereof; a combination means that multiple battery cells 20 are connected in both series and parallel. Therefore, the battery device 100 may also include other structures, such as a busbar, for establishing an electrical connection between at least two battery cells 20. When there are multiple battery cells 20, at least some of the battery cells 20 can be stacked in one direction to form a battery pack. The battery device 100 may include only one battery pack, or it may include two or more battery packs, in which case the battery packs can be arranged side-by-side. Furthermore, the battery cell 20 can be a secondary battery or a primary battery. A secondary battery is a battery that can be recharged after discharge to activate the active materials and continue to be used. Further, the battery cell 20 can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. Additionally, the battery cell 20 can be cylindrical, flat, cuboid, or other shapes.

[0057] In this application, the battery device 100 integrates the bottom plate 111 of the battery box 10's box body 11 with at least one of the two side plates 113 through an extrusion molding structure, eliminating the need for welding between the bottom plate 111 and the side plate 113. Simultaneously, the extrusion cavity 111b within the bottom plate 111 forms a heat exchange channel 111a, eliminating the need for an additional cold plate for heat exchange between the battery cells 20. This simplifies the number of components and eliminates the need for welding the cold plate. Therefore, by integrally extruding the bottom plate 111 and side plate 113 with integrated heat exchange channel 111a, the battery device 100 reduces the amount of welding required, minimizing structural deformation or cracks caused by welding stress due to improper welding. This further meets the high safety and long lifespan requirements of the battery device 100 under complex operating conditions. In addition, the heat exchange channel 111a is formed in the bottom plate 111 by extrusion cavity 111b through integral extrusion molding, which can also make the heat exchange channel 111a have a high sealing effect so that the battery device 100 can work safely and stably.

[0058] Please refer to Figure 5 In one embodiment of this application, the bottom plate 111 includes a first sub-plate 1111 and a second sub-plate 1113, which are arranged along a first direction; the first sub-plate 1111 and one of the two side plates 113 are integrally extruded and molded, and the second sub-plate 1113 and one of the two side plates 113 are integrally extruded and molded.

[0059] The first sub-plate 1111 and the second sub-plate 1113, i.e., the bottom plate 111, are split into two parts between the two side plates 113. In this case, heat exchange channels 111a can be distributed on the first sub-plate 1111 and the second sub-plate 1113 to increase the coverage area of ​​the heat exchange channels 111a and improve the cooling effect on the battery cells 20 located inside the battery box 10. Alternatively, the heat exchange channels 111a can be provided only on one of the first sub-plate 1111 and the second sub-plate 1113.

[0060] In this embodiment, the bottom plate 111 is split into a first sub-plate 1111 and a second sub-plate 1113, such that the first sub-plate 1111 and one side plate 113 can form a component, and the second sub-plate 1113 and another side plate 113 can form a component. At this point, the two components are relatively small in size, allowing for integral extrusion molding using a smaller and simpler mold, thus improving the ease of mold manufacturing.

[0061] Please refer to the reference. Figures 5 to 7 In one embodiment of this application, the heat exchange channel 111a includes a plurality of interconnected first sub-channels 111a1, the plurality of first sub-channels 111a1 are arranged along a first direction and all extend along a second direction; the plurality of first sub-channels 111a1 are respectively distributed on a first sub-plate 1111 and a second sub-plate 1113, and the connection between the first sub-plate 1111 and the second sub-plate 1113 is located between two adjacent first sub-channels 111a1.

[0062] The multiple first sub-channels 111a1 can be arranged in series, in parallel, or in a mixed arrangement of series and parallel connections. The connection between the first sub-plate 1111 and the second sub-plate 1113 is located between two adjacent first sub-channels 111a1. That is, the first sub-channel 111a1 in the first sub-plate 1111 that is closest to the second sub-plate 1113 and the first sub-channel 111a1 in the second sub-plate 1113 that is closest to the first sub-plate 1111 are independently and completely arranged.

[0063] In this embodiment, the connection between the first sub-plate 1111 and the second sub-plate 1113 is located between two adjacent first sub-channels 111a1, so that the two adjacent first sub-channels 111a1 are independently and completely configured. This reduces the impact of separating the first sub-plate 1111 and the second sub-plate 1113 on the sealing performance of the first sub-channel 111a1, thereby reducing the possibility of leakage in the heat exchange channel 111a at the connection between the first sub-plate 1111 and the second sub-plate 1113.

[0064] Of course, it should be noted that this application is not limited to this. In other embodiments, the connection between the first sub-plate 1111 and the second sub-plate 1113 can also be provided with a corresponding first sub-channel 111a1. In this case, the first sub-channel 111a1 can be formed by the first sub-plate 1111 and the second sub-plate 1113.

[0065] In one embodiment of this application, the first sub-board 1111 and the second sub-board 1113 are welded together.

[0066] In this embodiment, the first sub-plate 1111 and the second sub-plate 1113 are welded together as a whole. This can improve the stability of the connection between the two, improve the sealing of the heat exchange channel 111a, and eliminate the need to set a connection structure on the first sub-plate 1111 and the second sub-plate 1113, thereby simplifying their respective structural settings.

[0067] In one embodiment of this application, in the first direction, the distance between the two box side plates 113 is defined as D1, and the distance between the box side plate 113 connected to the first sub-plate 1111 and the end of the first sub-plate 1111 near the second sub-plate 1113 is defined as D2, satisfying the relationship: 0.4≤D2 / D1≤0.6.

[0068] In this embodiment, setting the ratio of D2 to D1 to 0.4 to 0.6 allows the dimensions of the first sub-plate 1111 and the second sub-plate 1113 in the first direction to be equal or nearly equal. This enables the molds used for forming each sub-plate to have smaller volumes and simpler structures, thus facilitating manufacturing. The ratio of D2 to D1 can be 0.4, 0.45, 0.5, 0.55, or 0.6, or any value within the above range.

[0069] Please refer to the reference. Figures 5 to 8 In one embodiment of this application, the extrusion cavity 111b is open at both ends in the second direction, and the extrusion cavity 111b is provided with a plurality of first partition plates 1115 arranged side by side along the first direction to divide the extrusion cavity 111b into a plurality of first sub-channels 111a1, and the plurality of first sub-channels 111a1 are connected to form a heat exchange channel 111a.

[0070] The extrusion cavity 111b is open at both ends, which allows the bottom plate 111 to form a hollow structure with open ends in the second direction. When the bottom plate 111 is divided into a first sub-plate 1111 and a second sub-plate 1113 as described above, both the first sub-plate 1111 and the second sub-plate 1113 can be hollow structures with open ends in the second direction, and each of the first partition plates 1115 can be distributed within the first sub-plate 1111 and the second sub-plate 1113. Furthermore, when the junction of the first sub-plate 1111 and the second sub-plate 1113 is located between two adjacent first sub-channels 111a1 as described above, the first partition plate 1115 closest to the second sub-plate 1113 in the first sub-plate 1111 and the first partition plate 1115 closest to the first sub-plate 1111 in the second sub-plate 1113 are fitted together, and the junction of the first sub-plate 1111 and the second sub-plate 1113 is located between these two first partition plates 1115.

[0071] In this embodiment, the bottom plate 111 is configured as a hollow structure with openings at both ends in the second direction. At the same time, the heat exchange channels 111a are configured as multiple first sub-channels 111a1 arranged side by side along the first direction by the internal first partition plate 1115. This makes the structure of the bottom plate 111 relatively simple and facilitates the formation of the heat exchange channels 111a inside the bottom plate 111 by the integral extrusion molding process as described above.

[0072] Please refer to the reference. Figure 2 as well as Figures 4 to 8 In one embodiment of this application, the bottom plate 111 is defined to have a first end 111c and a second end 111d opposite each other in a second direction. The battery box 10 also includes a current collector 15, which covers the opening of the first end 111c. The current collector 15 is provided with an inlet port 15a and an outlet port 15b, both of which are connected to the heat exchange channel 111a.

[0073] The manifold 15 can be used to seal the opening at the first end 111c of the bottom plate 111, thereby sealing each of the first sub-channels 111a1 at the first end 111c. At this time, each of the first partition plates 1115 within the bottom plate 111 can be partially spaced from the manifold 15 to allow communication between adjacent first sub-channels 111a1 at that end. Other portions can be in contact with the manifold 15 to isolate adjacent first sub-channels 111a1 at that end. Additionally, the manifold 15 can also serve as a transitional connection between the heat exchange channel 111a within the bottom plate 111 and the external circulation pipeline. That is, the liquid inlet 15a and liquid outlet 15b on the manifold 15 can be used to connect to the liquid inlet pipe and liquid outlet pipe in the external circulation pipeline, respectively. The liquid inlet 15a and the liquid inlet pipe in the external circulation pipeline can be directly connected, or they can be detachably connected via a pipe joint 30. Similarly, the liquid outlet 15b can be directly connected to the liquid outlet pipe in the external circulation pipeline, or the two can be detachably connected via pipe connector 30. Additionally, the liquid inlet 15a can be connected to two adjacent first sub-channels 111a1 in the heat exchange channel 111a, as described below, or it can be connected to only one first sub-channel 111a1. Likewise, the liquid outlet 15b can be connected to two adjacent first sub-channels 111a1 in the heat exchange channel 111a, as described below, or it can be connected to only one first sub-channel 111a1. Furthermore, the liquid inlet 15a and the first sub-channel 111a1 in the heat exchange channel 111a can be indirectly connected via the first transition channel 15d, as described below, or they can be directly connected. Similarly, the liquid outlet 15b and the first sub-channel 111a1 in the heat exchange channel 111a can be indirectly connected via the second transition channel 15e, as described below, or they can be directly connected. Furthermore, the connection between the manifold 15 and the bottom plate 111 can be welded to improve the stability of the connection and the sealing effect of the heat exchange channel 111a. Alternatively, adhesive bonding or other connection methods can be used; this application does not limit the connection method of the manifold 15.

[0074] In this embodiment, a current collector 15 can seal multiple first sub-channels 111a1 at the first end 111c, and can also provide transitional connection between the multiple first sub-channels 111a1 and the external circulation pipeline, thereby enabling one component to perform multiple functions, so as to further simplify the number of components in the battery device 100.

[0075] Please refer to the reference. Figure 6 and Figure 7 In one embodiment of this application, the current collector 15 is provided with a mounting hole 15c.

[0076] The mounting hole 15c can be used to externally mount the battery device 100. For example, when mounting the mounting hole 15c onto the vehicle 1000 described above, a threaded connector (e.g., a bolt or screw) can be passed through the mounting hole 15c to achieve a threaded connection with a component on the vehicle 1000. The number of mounting holes 15c can be one, two, or more.

[0077] In this embodiment, a mounting hole 15c is integrated on the manifold 15, so that the manifold 15, in addition to sealing the first end 111c of the multiple first sub-channels 111a1 in the heat exchange channel 111a as described above and providing transitional communication between the multiple first sub-channels 111a1 and the external circulation pipeline, can further serve as an external mounting connection for the battery device 100. This further eliminates the need for a mounting bracket, thereby further reducing the welding work required for the battery device 100.

[0078] Please refer to Figure 6 In one embodiment of this application, the manifold 15 extends along a first direction, and the inlet port 15a and the outlet port 15b are respectively located at both ends of the manifold 15 in the first direction, and the mounting hole 15c is located between the inlet port 15a and the outlet port 15b.

[0079] In this embodiment, the liquid inlet 15a and liquid outlet 15b are distributed at both ends of the manifold 15 in the first direction, which facilitates the arrangement of the entire flow path of the heat exchange channel 111a from one end to the other in the first direction, improves the regularity of the flow path, and thus facilitates the integral extrusion molding of the bottom plate 111. At the same time, it enables the heat exchange medium to flow orderly in the heat exchange channel 111a and has good fluidity, improving the cooling effect on the battery cells 20 located in the battery box 10. Furthermore, the mounting hole 15c is set between the liquid inlet 15a and the liquid outlet 15b, so that the liquid inlet 15a, the liquid outlet 15b and the mounting hole 15c can be distributed relatively evenly on the manifold 15 along the first direction, improving the uniformity of strength of the manifold 15, and thus improving the stability of the subsequent installation of the battery device 100.

[0080] In one embodiment of this application, the opening of the receiving groove 11a is provided facing the third direction, and the mounting hole 15c extends along the third direction and penetrates the current collector 15 on both sides of the third direction.

[0081] As described above, the opening of the receiving slot 11a can be oriented upwards. Therefore, this third direction can be the height direction of the battery device 100.

[0082] In this embodiment, the mounting hole 15c extends along the height direction and penetrates the upper and lower surfaces of the current collector 15. This allows the battery device 100 to be directly secured to the vehicle 1000 from top to bottom with screw fasteners, thereby improving the convenience of assembling and disassembling the battery device 100. Furthermore, the mounting hole 15c is located between the two liquid inlet ports 15a and the liquid outlet port 15b, ensuring that the connection between the battery device 100 and the vehicle 1000 does not occupy space in the first direction of the battery device 100, i.e., the width direction. This facilitates the installation of the battery device 100 within a limited space.

[0083] Please refer to the reference. Figure 4 , Figure 6 as well as Figure 8 In one embodiment of this application, both the liquid inlet 15a and the liquid outlet 15b are located on the side of the manifold 15 facing the opening of the receiving groove 11a.

[0084] In this embodiment, the inlet port 15a and the outlet port 15b are arranged facing upwards, so that when the battery device 100 is installed on the vehicle 1000, the inlet port 15a and the outlet port 15b can be well exposed, thereby facilitating the connection between the inlet port 15a and the outlet port 15b and the external circulation pipeline.

[0085] Please refer to the reference. Figures 6 to 8 In one embodiment of this application, the flow collector 15 is provided with a first transition flow channel 15d, the liquid inlet 15a is connected to the first transition flow channel 15d, and two adjacent first sub-flow channels 111a1 correspond to the first transition flow channel 15d and are connected in parallel.

[0086] The first transition channel 15d can extend along the second direction, and is closed at one end and open at the other end to communicate with two adjacent first sub-channels 111a1 through the opening. At this time, the first partition plate 1115 located between the two adjacent first sub-channels 111a1 can be spaced apart from the flow collector 15 so as to realize the communication between the opening of the first transition channel 15d and the two adjacent first sub-channels 111a1.

[0087] In this embodiment, a first transition channel 15d is set to connect with two adjacent first sub-channels 111a1 in parallel, so that after passing through the first transition channel 15d, the heat exchange medium can enter the two adjacent first sub-channels 111a1 respectively, which helps to reduce the flow resistance of the heat exchange medium when entering the heat exchange channel 111a1 and improve the flow effect of the heat exchange medium.

[0088] In one embodiment of this application, two first sub-channels 111a1 corresponding to the first transition channel 15d can be defined as the first two first sub-channels 111a1. The third first sub-channel 111a1 and the first two first sub-channels 111a1 can be connected in series to increase the flow velocity and further improve the flow effect of the heat exchange medium. Of course, in other embodiments, the third first sub-channel 111a1 and the first two first sub-channels 111a1 can also be connected in parallel.

[0089] Please refer to the reference. Figure 8 and Figure 9 In one embodiment of this application, a second partition plate 151 is provided in the first transition channel 15d to divide the first transition channel 15d into two second sub-channels 15d1; one end of the two second sub-channels 15d1 is connected in parallel and connected to the liquid inlet 15a, and the other end is respectively connected to the two adjacent first sub-channels 111a1.

[0090] The second partition plate 151 can be correspondingly provided with the first partition plate 1115 between the two first sub-channels 111a1 corresponding to the first transition channel 15d. Moreover, one end of the second partition plate 151 near the corresponding first partition plate 1115 can extend to the opening of the first transition channel 15d, and the other end can be spaced apart from the wall surface of the first transition channel 15d opposite the opening.

[0091] In this embodiment, the first transition channel 15d is divided into two second sub-channels 15d1 by the second partition plate 151, so that after the heat exchange medium enters the first transition channel 15d, the second partition plate 151 can divert the heat exchange medium, allowing it to enter the corresponding two first sub-channels 111a1 more smoothly through the two second sub-channels 15d1.

[0092] Please refer to the reference. Figure 8 and Figure 9 In one embodiment of this application, the flow collector 15 is provided with a second transition flow channel 15e, the liquid outlet 15b is connected to the second transition flow channel 15e, and two adjacent first sub-flow channels 111a1 correspond to the second transition flow channel 15e and are connected in parallel.

[0093] The second transition channel 15e can also extend along the second direction, with one end closed and the other end open, so as to communicate with the two adjacent first sub-channels 111a1 through the opening. In this case, the first partition plate 1115 located between the two adjacent first sub-channels 111a1 can be spaced apart from the flow collector 15 so as to realize the communication between the opening of the second transition channel 15e and the two adjacent first sub-channels 111a1.

[0094] In this embodiment, a second transition channel 15e is provided to connect in parallel with two adjacent first sub-channels 111a1. This allows the heat exchange medium to enter the second transition channel 15e through the two last parallel first sub-channels 111a1. This achieves symmetry with the flow path of the heat exchange medium entering the first two parallel first sub-channels 111a1 through the first transition channel 15d. This improves the uniformity of the flow velocity and flow rate of the heat exchange medium at the inlet and outlet of the heat exchange channel 111a, thereby enhancing the overall stability of the heat exchange medium flow.

[0095] Please refer to the reference. Figure 8 and Figure 9 In one embodiment of this application, a third partition plate 153 is provided in the second transition channel 15e to divide the second transition channel 15e into two third sub-channels 15e1; one end of the two third sub-channels 15e1 is connected in parallel and connected to the liquid outlet 15b, and the other end is respectively connected to the two adjacent first sub-channels 111a1.

[0096] The third partition plate 153 can be correspondingly provided with the first partition plate 1115 between the two first sub-channels 111a1 corresponding to the second transition channel 15e. Moreover, one end of the third partition plate 153 near the corresponding first partition plate 1115 can extend to the opening of the second transition channel 15e, and the other end can be spaced apart from the wall surface of the second transition channel 15e opposite the opening.

[0097] In this embodiment, the second transition channel 15e is divided into two third sub-channels 15e1 by the third partition plate 153, so that after the heat exchange medium flows out from the two adjacent first sub-channels 111a1, the second partition plate 151 can divert the heat exchange medium, allowing it to enter the second transition channel 15e more smoothly.

[0098] Please refer to Figure 4 In one embodiment of this application, on a projection plane perpendicular to a third direction, both the liquid inlet 15a and the liquid outlet 15b are located outside the projection of the accommodating cavity 10a.

[0099] The liquid inlet 15a and the liquid outlet 15b are located outside the projection of the accommodating cavity 10a, that is, the liquid inlet 15a and the liquid outlet 15b are located outside the battery box 10.

[0100] In this embodiment, the liquid inlet 15a and the liquid outlet 15b are located on the outside of the battery box 10, so that the pipe joint 30 connecting the liquid inlet 15a and the liquid outlet 15b to the liquid inlet pipe and the liquid outlet pipe in the external circulation pipe can be located on the outside of the battery box 10, thus not occupying space on the inside of the battery box 10, while also facilitating its disassembly, assembly and maintenance.

[0101] Please refer to the reference. Figure 6 and Figure 7 In one embodiment of this application, the bottom plate 111 is provided with an installation notch 111e at the first end 111c, the opening of the first end 111c is connected to the installation notch 111e, and the current collector 15 is provided at the installation notch 111e.

[0102] The mounting notch 111e can be formed by three walls, two of which are arranged opposite each other in a first direction, and the third wall is connected to the two opposite walls and forms an opening with a first end 111c. Alternatively, when the bottom plate 111 includes a first sub-plate 1111 and a second sub-plate 1113 as described above, the mounting notch 111e can be distributed on the first sub-plate 1111 and the second sub-plate 1113.

[0103] In this embodiment, by adapting the current collector 15 to the mounting notch 111e, the compactness of the distribution between the current collector 15 and the bottom plate 111 can be improved, thereby reducing the overall volume of the battery box 10 and improving the convenience of its subsequent installation and arrangement in a limited space. At the same time, the contact area between the current collector 15 and the bottom plate 111 can be increased, which in turn helps to improve the convenience and stability of the connection between the two.

[0104] Please refer to the reference. Figures 6 to 9 In one embodiment of this application, the current collector 15 is inserted into the bottom plate 111 of the box.

[0105] A plug-in fit means that one component is inserted into the recessed structure of another component via a protruding structure. For example, as described below, a portion of the current collector 15 can be inserted into the first annular groove 111f formed on the inner side of the first end 111c of the bottom plate 111; alternatively, a groove surrounding the opening of the first end 111c can be provided on the end face of the bottom plate 111, or a groove surrounding the opening of the first end 111c can be provided on the outer side of the bottom plate 111, for the plug-in fit of the current collector 15. Alternatively, the current collector 15 can have a groove, and the end face of the first end 111c of the bottom plate 111 can have a protruding rib inserted into the groove.

[0106] In this embodiment, the current collector 15 and the bottom plate 111 are configured to be plugged into each other, which can increase the limiting constraint force between them, thereby improving the stability of the connection between the current collector 15 and the bottom plate 111. This will improve the stability of the subsequent installation of the battery device 100 when the current collector 15 is integrated with the mounting hole 15c described above.

[0107] Please refer to the reference. Figures 6 to 9 In one embodiment of this application, the bottom plate 111 is provided with a first annular groove 111f on the inner side of the first end 111c. The groove opening of the first annular groove 111f is configured as the opening of the first end 111c, and part of the current collector 15 is inserted into the first annular groove 111f.

[0108] In this embodiment, by providing a first annular groove 111f on the inner side of the first end 111c of the bottom plate 111 for the current collector 15 to be inserted and fitted, it is not necessary to provide a recessed structure on the current collector 15 for insertion and fitting. This helps to improve the structural strength of the current collector 15, so that when the current collector 15 integrates the mounting hole 15c described above, the stability of the subsequent installation of the battery device 100 can be further improved. At the same time, it also makes the structure of the bottom plate 111 simpler, thereby improving the ease of its manufacture.

[0109] In one embodiment of this application, the current collector 15 is welded to the bottom plate 111.

[0110] In this embodiment, the manifold 15 and the bottom plate 111 are welded together as a whole, which can improve the stability of the connection between the two; at the same time, it can also improve the sealing performance of the heat exchange channel 111a; moreover, it eliminates the need to set up a connection structure on the manifold 15 and the bottom plate 111, thereby simplifying their respective structural settings.

[0111] Please refer to the reference. Figure 6 and Figure 7 In one embodiment of this application, the manifold 15 is provided with two protrusions 155, and the liquid inlet 15a and the liquid outlet 15b are respectively provided on the two protrusions 155.

[0112] In this embodiment, the manifold 15 is provided with protrusions 155 at the corresponding liquid inlet 15a and liquid outlet 15b positions, which makes the manifold 15 have a thicker thickness at these positions, thereby facilitating the provision of liquid inlet 15a and liquid outlet 15b with sufficient depth, so as to improve the convenience and stability of connecting with the pipe joint 30 or the liquid inlet pipe and liquid outlet pipe in the external circulating cooling pipe.

[0113] Please refer to the reference. Figure 6 and Figure 8In one embodiment of this application, the battery box 10 further includes a sealing member 17, which covers the opening of the second end 111d.

[0114] The sealing element 17 can be used to cover the opening at the second end 111d of the bottom plate 111, so as to seal each of the first sub-flow channels 111a1 at the second end 111d. At this time, each of the first partition plates 1115 inside the bottom plate 111 can be partially spaced from the sealing element 17 to achieve communication between two adjacent first sub-flow channels 111a1 at that end. Other portions can be in contact with the sealing element 17 to achieve isolation between two adjacent first sub-flow channels 111a1 at that end. Furthermore, the connection between the sealing element 17 and the bottom plate 111 can be welded to improve the stability of the connection and the sealing effect of the heat exchange channels 111a. Of course, adhesive bonding or other connection methods can also be used; this application does not limit the connection method of the sealing element 17.

[0115] In this embodiment, a sealing member 17 can seal multiple first sub-channels 111a1 at the second end 111d. By sealing the heat exchange channel 111a at the second end 111d, the number of components in the battery device 100 can be simplified.

[0116] Please refer to the reference. Figure 6 , Figure 8 as well as Figure 10 In one embodiment of this application, the sealing member 17 is inserted into the bottom plate 111 of the box.

[0117] The sealing member 17 is inserted into the bottom plate 111. This can be achieved by partially inserting the sealing member 17 into the second annular groove 111g formed inside the second end 111d of the bottom plate 111, as described below. Alternatively, the bottom plate 111 may have a groove surrounding the opening of the second end 111d on its end face, or a groove surrounding the opening of the second end 111d may be provided on the outside of the bottom plate 111, for the insertion and engagement of the sealing member 17. Alternatively, the sealing member 17 may have a groove, and the bottom plate 111 may have a rib on its end face, with the rib inserted into the groove.

[0118] In this embodiment, the sealing member 17 and the bottom plate 111 are configured to be plugged into each other, which increases the limiting constraint force between them, thereby improving the stability of the connection between the sealing member 17 and the bottom plate 111. At the same time, it can also increase the contact area between them, thereby improving the sealing effect of the sealing member 17 on the second end 111d of the bottom plate 111.

[0119] Please refer to the reference. Figure 6 , Figure 8as well as Figure 10 In one embodiment of this application, the bottom plate 111 is provided with a second annular groove 111g on the inner side of the second end 111d. The groove opening of the second annular groove 111g is configured as the opening of the second end 111d, and part of the sealing member 17 is inserted into the second annular groove 111g.

[0120] In this embodiment, by providing a second annular groove 111g on the inner side of the second end 111d of the bottom plate 111 for the plugging part of the sealing member 17 to be inserted and fitted, the structure of the bottom plate 111 can be made simpler, which in turn improves the ease of its manufacture.

[0121] In one embodiment of this application, the sealing member 17 is welded to the bottom plate 111 of the box.

[0122] In this embodiment, the sealing component 17 and the bottom plate 111 are welded together as a whole, which can improve the stability of the connection between the two; at the same time, it can also improve the sealing performance of the heat exchange channel 111a; moreover, it eliminates the need to set a connection structure on the sealing component 17 and the bottom plate 111, thereby simplifying their respective structural settings.

[0123] Please refer to Figure 8 In one embodiment of this application, some of the multiple first sub-channels 111a1 are connected in series, and some of the first sub-channels 111a1 are connected in parallel.

[0124] In this embodiment, the multiple first sub-channels 111a1 are configured to include both series and parallel connections, which makes the connections between the multiple first sub-channels 111a1 more diverse, so that the corresponding connection methods can be adopted in different locations according to the needs, so as to adjust the flow rate and flow rate of the heat exchange medium at that location.

[0125] In one embodiment of this application, the bottom plate 111 and at least one of the two side plates 113 are integrally extruded.

[0126] In this embodiment, the bottom plate 111 and at least one side plate 113 are integrally extruded to facilitate the formation of heat exchange channels 111a inside the bottom plate 111.

[0127] Please refer to the reference. Figure 4 and Figure 5 In one embodiment of this application, the battery box 10 may further include two mounting beams 19, which may be disposed inside the box body 11 and located at both ends of the bottom plate 111 in the second direction, so that the two ends of the battery pack formed by stacking multiple battery cells 20 can be respectively connected to the two mounting beams 19, thereby improving the stability of the battery cells 20 installed in the battery box 10.

[0128] Please refer to the reference. Figures 2 to 10In one embodiment of this application, the battery device 100 includes a battery case 10 and battery cells 20. The battery case 10 includes a case body 11 and a case cover 13. The case body 11 includes a bottom plate 111, two side plates 113, and two end plates 115. The two side plates 113 are respectively disposed on both sides of the bottom plate 111 in a first direction and are configured with the bottom plate 111 as an integrally extruded structure extruded along a second direction, the second direction intersecting the first direction; the two side plates 113 are disposed on the bottom plate 111 on both sides of the bottom plate 111 in a second direction. On both sides in the second direction; the bottom plate 111, two side plates 113, and two end plates 115 are arranged to form a receiving groove 11a. The cover 13 covers the opening of the receiving groove 11a and together with the receiving groove 11a, forms a receiving cavity 10a. The battery cell 20 is disposed in the receiving cavity 10a. The bottom plate 111 has an extrusion cavity 111b, which is configured as a heat exchange channel 111a. The heat exchange channel 111a is configured to conduct heat exchange medium for heat exchange with the battery cell 20. The bottom plate 111 includes a first sub-plate 1111 and a second sub-plate 1113, which are arranged along the first direction. The first sub-plate 1111 and one of the two side plates 113 are integrally extruded and molded. The second sub-plate 1113 and one of the two side plates 113 are integrally extruded and molded. The heat exchange channel 111a includes multiple interconnected first sub-channels 111a1, which are arranged along a first direction and extend along a second direction. The multiple first sub-channels 111a1 are respectively distributed on a first sub-plate 1111 and a second sub-plate 1113, with the connection between the first sub-plate 1111 and the second sub-plate 1113 located between two adjacent first sub-channels 111a1. The first sub-plate 1111 and the second sub-plate 1113 are welded together. In the first direction, the distance between the two side plates 113 is defined as D1, and the distance between the side plate 113 connected to the first sub-plate 1111 and the end of the first sub-plate 1111 closest to the second sub-plate 1113 is defined as D2, satisfying the relationship: 0.4 ≤ D2 / D1 ≤ 0.6. The extrusion chamber 111b is open at both ends in the second direction. Multiple first partition plates 1115 arranged side-by-side along the first direction are provided inside the extrusion chamber 111b to divide it into multiple first sub-channels 111a1. These multiple first sub-channels 111a1 are connected to form a heat exchange channel 111a. The bottom plate 111 is defined to have opposing first ends 111c and 111d in the second direction. The battery box 10 also includes a current collector 15, which covers the opening at the first end 111c. The current collector 15 has an inlet port 15a and an outlet port 15b, both of which are connected to the heat exchange channel 111a. The current collector 15 also has a mounting hole 15c.The manifold 15 extends along a first direction, with an inlet port 15a and an outlet port 15b respectively located at both ends of the manifold 15 in the first direction. A mounting hole 15c is located between the inlet port 15a and the outlet port 15b. The opening of the receiving groove 11a faces a third direction, and the mounting hole 15c extends along the third direction and penetrates both sides of the manifold 15 in the third direction. Alternatively, both the inlet port 15a and the outlet port 15b are located on the side of the manifold 15 facing the opening of the receiving groove 11a. The manifold 15 has a first transition channel 15d, with the inlet port 15a connected to the first transition channel 15d. Two adjacent first sub-channels 111a1 correspond to the first transition channel 15d and are connected in parallel. A second partition plate 151 is provided within the first transition channel 15d to divide the first transition channel 15d into two second sub-channels 15d1. One end of each of the two second sub-channels 15d1 is connected in parallel and communicates with the liquid inlet 15a, while the other end is respectively connected to the two adjacent first sub-channels 111a1. A second transition channel 15e is provided within the manifold 15, and the liquid outlet 15b is connected to the second transition channel 15e. The two adjacent first sub-channels 111a1 correspond to the second transition channel 15e and are connected in parallel. A third partition plate 153 is provided within the second transition channel 15e to divide the second transition channel 15e into two third sub-channels 15e1. One end of each of the two third sub-channels 15e1 is connected in parallel and communicates with the liquid outlet 15b, while the other end is respectively connected to the two adjacent first sub-channels 111a1. The opening of the receiving groove 11a is positioned facing a third direction. On a projection plane perpendicular to the third direction, both the inlet port 15a and the outlet port 15b are located outside the projection of the receiving cavity 10a. The bottom plate 111 has a mounting notch 111e at its first end 111c, with the opening of the first end 111c communicating with the mounting notch 111e. The manifold 15 is located at the mounting notch 111e. The manifold 15 is inserted into the bottom plate 111. The bottom plate 111 has a first annular groove 111f on the inner side of the first end 111c, with the opening of the first annular groove 111f being the opening of the first end 111c. A portion of the manifold 15 is inserted into the first annular groove 111f. The manifold 15 is welded to the bottom plate 111. The manifold 15 has two protrusions 155, with the inlet port 15a and outlet port 15b respectively located on the two protrusions 155. The bottom plate 111 is defined to have a first end 111c and a second end 111d opposite each other in a second direction. The battery box 10 also includes a sealing member 17, which covers the opening of the second end 111d. The sealing member 17 is inserted into the bottom plate 111. The bottom plate 111 has a second annular groove 111g on the inner side of the second end 111d. The opening of the second annular groove 111g is configured to be the opening of the second end 111d, and a portion of the sealing member 17 is inserted into the second annular groove 111g.The sealing component 17 is welded to the bottom plate 111. Among the multiple first sub-flow channels 111a1, some of the first sub-flow channels 111a1 are connected in series, and some of the first sub-flow channels 111a1 are connected in parallel.

[0129] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the inventive concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A battery device, characterized by, include: A battery box, comprising a box body and a box cover, wherein the box body includes a bottom plate, two side plates, and two end plates; the two side plates are respectively disposed on both sides of the bottom plate in a first direction, and at least one of them is configured with the bottom plate as an integrally extruded structure extruded along a second direction, the second direction intersecting the first direction; the two end plates are disposed on both sides of the bottom plate in the second direction; the bottom plate, the two side plates, and the two end plates are configured to form a receiving groove, and the box cover closes to the opening of the receiving groove and is configured with the receiving groove to form a receiving cavity; and A battery cell, wherein the battery cell is disposed within the accommodating cavity; The bottom plate of the box has an extrusion cavity, which is configured as a heat exchange channel. The heat exchange channel is configured to conduct heat exchange medium to exchange heat with the battery cell.

2. The battery device of claim 1, wherein The bottom plate of the box includes a first sub-plate and a second sub-plate, and the first sub-plate and the second sub-plate are arranged along the first direction; The first sub-plate and one of the two box side plates are integrally extruded and molded, and the second sub-plate and one of the two box side plates are integrally extruded and molded.

3. The battery device of claim 2, wherein The heat exchange channel includes a plurality of interconnected first sub-channels, which are arranged along the first direction and extend along the second direction. The plurality of first sub-channels are respectively distributed on the first sub-plate and the second sub-plate, and the connection between the first sub-plate and the second sub-plate is located between two adjacent first sub-channels.

4. The battery device of claim 2, wherein The first sub-board is welded to the second sub-board.

5. The battery device of claim 2, wherein In the first direction, the distance between the two box side panels is defined as D1, and the distance between the box side panel connected to the first sub-plate and the end of the first sub-plate closer to the second sub-plate is defined as D2, satisfying the relationship: 0.4≤D2 / D1≤0.

6.

6. The battery device according to any one of claims 1 to 5, wherein The extrusion cavity is open at both ends in the second direction. The extrusion cavity is provided with a plurality of first partition plates arranged side by side along the first direction to divide the extrusion cavity into a plurality of first sub-channels. The plurality of first sub-channels are connected to form the heat exchange channel.

7. The battery device of claim 6, wherein The bottom plate of the battery box is defined to have a first end and a second end opposite to each other in the second direction. The battery box also includes a current collector that covers the opening at the first end. The manifold is provided with a liquid inlet and a liquid outlet, both of which are connected to the heat exchange channel.

8. The battery device of claim 7, wherein The current collector is provided with mounting holes.

9. The battery device of claim 8, wherein, The manifold extends along the first direction, the inlet and outlet are respectively located at the two ends of the manifold in the first direction, and the mounting hole is located between the inlet and outlet.

10. The battery device of claim 8, wherein, The opening of the receiving groove is provided on the side facing the third direction, the mounting hole extends along the third direction and penetrates the manifold on both sides of the third direction, and / or, the liquid inlet and liquid outlet are both provided on the side of the manifold facing the opening of the receiving groove.

11. The battery device of claim 7, wherein The flow collector is provided with a first transition flow channel, the liquid inlet is connected to the first transition flow channel, and two adjacent first sub-flow channels correspond to the first transition flow channel and are connected in parallel.

12. The battery device of claim 11, wherein, The first transition channel is provided with a second partition plate to divide the first transition channel into two second sub-channels; One end of each of the two second sub-channels is connected in parallel and communicates with the liquid inlet, while the other end is respectively connected to the two adjacent first sub-channels.

13. The battery device of claim 7, wherein The flow collector is provided with a second transition flow channel, the liquid outlet is connected to the second transition flow channel, and two adjacent first sub-flow channels correspond to the second transition flow channel and are connected in parallel.

14. The battery device of claim 13, wherein, The second transition channel is provided with a third partition plate to divide the second transition channel into two third sub-channels; One end of each of the two third sub-channels is connected in parallel and communicates with the liquid outlet, while the other end is respectively connected to the two adjacent first sub-channels.

15. The battery device of claim 7, wherein, The opening of the receiving groove is set on the side facing the third direction upward. On the projection plane perpendicular to the third direction, both the liquid inlet and the liquid outlet are located outside the projection of the receiving cavity.

16. The battery device of claim 7, wherein The bottom plate of the box has an installation notch at the first end, the opening at the first end is connected to the installation notch, and the current collector is located at the installation notch.

17. The battery device of claim 7, wherein, The current collector is inserted into the bottom plate of the box.

18. The battery device of claim 17, wherein, The bottom plate of the box is provided with a first annular groove on the inner side of the first end, and the groove opening of the first annular groove is configured as the opening of the first end. Part of the current collector is inserted into the first annular groove.

19. The battery device of claim 7, wherein, The current collector is welded to the bottom plate of the box.

20. The battery device of claim 7, wherein, The manifold has two protrusions, and the liquid inlet and the liquid outlet are respectively located on the two protrusions.

21. The battery device of claim 6, wherein, The bottom plate of the battery box is defined to have a first end and a second end opposite to each other in the second direction. The battery box also includes a sealing member that covers the opening at the second end.

22. The battery device of claim 21, wherein, The sealing component is inserted into the bottom plate of the box.

23. The battery device of claim 22, wherein, The bottom plate of the box is provided with a second annular groove on the inner side of the second end, and the groove opening of the second annular groove is configured as the opening of the second end. Part of the sealing member is inserted into the second annular groove.

24. The battery device of claim 21, wherein, The sealing component is welded to the bottom plate of the box.

25. The battery device of claim 6, wherein, Some of the multiple first sub-channels are connected in series, while others are connected in parallel.

26. An electrical device, comprising: Includes the battery device as described in any one of claims 1 to 25.

27. A battery pack, characterized by include: The box body includes a bottom plate, two side plates, and two end plates. The two side plates are respectively located on both sides of the bottom plate in a first direction, and at least one of them is configured with the bottom plate as an integrally extruded structure extruded along a second direction, the second direction intersecting the first direction. The two end plates are located on both sides of the bottom plate in the second direction. The bottom plate, the two side plates, and the two end plates are arranged to form a receiving groove. A lid that covers the opening of the receiving groove and is configured to enclose the receiving groove to form a receiving cavity; The bottom plate of the box has an extrusion cavity, which is configured as a heat exchange channel. The heat exchange channel is configured to conduct heat exchange medium to exchange heat with the battery cells located in the accommodating cavity.

28. The battery pack of claim 27, wherein, The bottom plate of the box includes a first sub-plate and a second sub-plate, and the first sub-plate and the second sub-plate are arranged along the first direction; The first sub-plate and one of the two box side plates are integrally extruded and molded, and the second sub-plate and one of the two box side plates are integrally extruded and molded.

29. The battery pack of claim 28, wherein, The heat exchange channel includes a plurality of interconnected first sub-channels, which are arranged along the first direction and extend along the second direction; the plurality of first sub-channels are respectively distributed on the first sub-plate and the second sub-plate, and the connection between the first sub-plate and the second sub-plate is located between two adjacent first sub-channels; And / or, the first sub-plate is welded to the second sub-plate.

30. The battery box as described in any one of claims 27 to 29, characterized in that, The extrusion cavity is open at both ends in the second direction. The extrusion cavity is provided with a plurality of first partition plates arranged side by side along the first direction to divide the extrusion cavity into a plurality of first sub-channels. The plurality of first sub-channels are connected to form the heat exchange channel.

31. The battery pack of claim 30, wherein, The bottom plate of the battery box is defined to have a first end and a second end opposite to each other in the second direction. The battery box also includes a current collector that covers the opening at the first end. The manifold is provided with a liquid inlet and a liquid outlet, both of which are connected to the heat exchange channel. The manifold is also provided with mounting holes.

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