Battery devices, energy storage devices, and power consumption devices

Abstract

To provide battery devices, energy storage devices, and power consumption devices that improve the structural stability of battery devices and ensure safety during use. [Solution] The battery device includes a liquid cooling plate 11, a cover 12, a plurality of cells, and a plurality of reinforcing members 14. The cover is placed over the liquid cooling plate. The plurality of cells are located on the liquid cooling plate and inside the cover. The plurality of reinforcing members are connected to the liquid cooling plate and are located on the side of the liquid cooling plate away from the cover. The reinforcing members extend along a first direction A, and the reinforcing members have a plurality of grooves that extend along the first direction and are arranged along a second direction B that intersects the first direction.

Description

Technical Field

[0001] The present application relates to the technical field of energy storage, and in particular to a battery device, an energy storage device and a power consumption device.

Background Art

[0002] With the continuous development of new energy technologies, the capability of various power generation devices to convert electric energy has been continuously improved, and battery devices are also being more and more widely applied. Sufficient electric energy converted by various power generation devices can be stored by the battery device so as to be output to the outside at any time. As the capacity of the battery device increases, its weight also increases.

[0003] The cells in the battery device have high charge-discharge cycle characteristics, and can adapt to the wide application of the battery device. Since the structural stability of the battery device affects the safety during use, how to improve the structural stability of the battery device to ensure the safety during use is an important issue.

Summary of the Invention

[0004] The embodiments of the present application aim to provide a battery device, an energy storage device and a power consumption device, which are advantageous for improving the structural stability of the battery device and can ensure safety during use.

[0005] To solve the above technical problems, the embodiments of the present application provide a battery device. The battery device includes a liquid cooling plate, a cover, a plurality of cells, and a plurality of reinforcing members. The cover is disposed to cover the liquid cooling plate. The plurality of cells are located on the liquid cooling plate and inside the cover. The plurality of reinforcing members are connected to the liquid cooling plate and located on the side of the liquid cooling plate facing away from the cover. The reinforcing members extend along a first direction, and a plurality of grooves extending along the first direction and arranged along a second direction intersecting the first direction are formed on the reinforcing members.

[0006] Embodiments of the present invention further provide an energy storage device, which includes the battery device for storing electrical energy.

[0007] Embodiments of the present invention further provide a power consumption device, which includes the battery device that supplies electrical energy.

[0008] The battery device, energy storage device, and power consumption device according to the embodiment of the present application utilize a liquid cooling plate to support multiple cells, and structural reinforcement is provided on one side of the liquid cooling plate by a reinforcing member. The reinforcing member has a groove extending in a first direction, and the groove has an uneven cross-section to distribute and counteract the load. Furthermore, by providing multiple reinforcing members on one side of the liquid cooling plate, structural reinforcement is performed at multiple locations, preventing problems such as liquid leakage and deformation from occurring due to the load from the cells on the liquid cooling plate, thereby improving the structural stability of the battery device and ensuring safety during use.

[0009] In some embodiments, the dimensions of the reinforcing member in the second direction are 10 mm to 1000 mm.

[0010] In some embodiments, the reinforcing member has a plurality of recesses formed along a first direction, the recesses being spaced apart from the liquid cooling plate and adjacent to the grooves.

[0011] In some embodiments, there are two grooves, and the recess is located between the two grooves, or there are more than two grooves, and recesses are formed on both sides of the centrally located groove along the second direction, each recess being provided along the second direction.

[0012] In some embodiments, a plurality of connecting members are provided on the side of the liquid cooling plate adjacent to the reinforcing member, and the recess is in close contact with the connecting member and connected to the connecting member.

[0013] In some embodiments, a projection is provided on the side of the liquid cooling plate away from the cover, and the connecting member is located between two adjacent projections.

[0014] In some embodiments, a gap is formed between two adjacent cells along a first direction, and the projection of the recess onto the surface of the liquid-cooled plate overlaps with the gap region between two adjacent cells along the first direction.

[0015] In some embodiments, a support member is provided on the side of the liquid cooling plate away from the cover, and a support member protruding from the surface of the reinforcing member is provided on at least one side of the reinforcing member.

[0016] In some embodiments, the reinforcing member has through holes that communicate with the grooves, with one end of the through hole facing the liquid cooling plate and the other end facing the side of the reinforcing member away from the liquid cooling plate.

[0017] In some embodiments, the dimensions of the groove in the second direction are 5 mm to 100 mm.

[0018] In some embodiments, the grooves are uniformly distributed along a second direction.

[0019] In some embodiments, the end of the reinforcing member is provided with a bent and extending connecting portion, which is in close contact with the edge of the liquid cooling plate and connected to it.

[0020] In some embodiments, multiple cells form multiple battery modules, and the direction of extension of the reinforcing member is parallel to the direction of arrangement of the multiple battery modules. [Brief explanation of the drawing]

[0021] One or more embodiments are illustrated by the corresponding drawings, and these illustrative descriptions are not limiting to the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements, and unless otherwise specified, the drawings are not limiting to proportions.

[0022] [Figure 1] This is a perspective view of a battery device according to several embodiments of the present application. [Figure 2]It is a bottom view of a battery device according to some embodiments of the present application. [Figure 3] It is a schematic diagram of the distribution structure of the back connection member of the liquid cooling plate in the battery device according to some embodiments of the present application. [Figure 4] It is a perspective structural view of the reinforcing member in the battery device according to some embodiments of the present application. [Figure 5] It is an enlarged schematic structural view of part C in FIG. 4. [Figure 6] It is a schematic diagram of the internal structure of a battery device according to some embodiments of the present application. [Figure 7] It is a schematic diagram of the combined structure of the battery module and the liquid cooling plate in the battery device according to some embodiments of the present application. [Mode for Carrying Out the Invention]

[0023] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, each embodiment of the present application will be described in detail below in conjunction with the accompanying drawings. However, those skilled in the art will appreciate that many technical details are presented in each embodiment of the present application to enable readers to better understand the present application. However, the technical means for which protection is sought in the present application may be implemented without these technical details and various changes and modifications based on the following embodiments. The division of the following embodiments is for the convenience of description only, and shall not constitute any limitation on the specific implementation manners of the present application, and the embodiments may be cited in combination with each other as long as there is no contradiction.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application belongs. The terms used herein are for the purpose of describing specific embodiments only, and are not intended to limit the present application. The terms "comprising", "having" and any variations thereof in the specification, claims and the above drawings of the present application are intended to cover non-exclusive inclusion.

[0025] In the description of the embodiments of this application, the technical terms "first," "second," etc., are merely used to distinguish different subjects and cannot be understood as indicating or implying relative importance, or implicitly indicating the number, specific order, or hierarchical relationship of the technical features shown. In the description of the embodiments of this application, "multiple" means two or more unless explicitly and specifically limited.

[0026] In the description of the embodiments of this application, the term "and / or" indicates a related relationship that describes related objects, and that there may be three possible relationships. For example, A and / or B can represent three cases: A exists, A and B exist simultaneously, and B exists. Also, the letter " / " in this specification generally indicates that the related objects before and after are in an "or" relationship.

[0027] In the description of the embodiments of this application, the orientations or positional relationships indicated by technical terms such as "center," "vertical direction," "horizontal direction," "length," "width," "thickness," "top," "bottom," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inside," "outside," "clockwise," "counterclockwise," "axial direction," "radial direction," and "circumferential direction" are based on the orientations or positional relationships shown in the drawings and are merely for the purpose of easily explaining and simplifying the embodiments of this application. They do not indicate or suggest that the shown devices or parts have a specific orientation or must be configured and operated in a specific orientation, and therefore should not be understood as limiting the embodiments of this application.

[0028] In the description of the embodiments of this application, unless otherwise explicitly specified and limited, the technical terms "attachment," "connection," and "connection" should be understood in a broad sense. For example, these may be fixed connections, removable connections, or integral connections; they may be mechanical connections or electrical connections; they may be direct connections or indirect connections via an intermediate medium; and they may be internal communication between two parts or an interactive relationship between two parts. Those skilled in the art will be able to understand the specific meaning of these terms in the embodiments of this application according to the specific circumstances.

[0029] In the drawings corresponding to the embodiments of this application, the thickness and / or area of ​​layers, films, panels, regions, etc., are shown enlarged for better understanding and to facilitate explanation. Throughout this specification, the same reference numerals represent the same elements. When a component (e.g., a layer, film, region, or substrate) is described as being on or on the surface of another component, the component may be located "directly" on the surface of the other component, or an intermediate component may exist between the two components. Conversely, when a component is described as being on the surface of another component, and a component is "directly" on the other component, or a component is formed or provided on the surface of a component, it indicates that there is no intermediate component between the two components. Furthermore, when a component is described as being "substantially" formed on the surface of another component, it means that the component is not formed on the entire surface (or front surface) of the other component, nor on any part of the edge of the entire surface.

[0030] A battery device includes a housing and cells housed within the housing. The cells are energy storage units in the battery device and can be assembled in specific numbers to form a battery module. Increasing the number of cells effectively improves the energy storage capacity of the battery device, but it also increases the weight, the load on the housing, and the susceptibility of the cell mounting area to deformation. For example, a long battery module in a battery device is made up of many cells, such as 26, with a single cell reaching a length of 260mm to 650mm, a width of 70mm to 80mm, and a height of 180mm to 300mm. As the battery module lengthens, the unidirectional load distribution becomes longer, and the load on the bottom of the housing also increases. After the housing structure of the battery device is simplified and the bottom plate is removed, the area below the cells is a liquid cooling plate. The increased load means that the liquid cooling plate may be affected by the load, potentially leading to problems such as leakage and deformation.

[0031] To improve the structural stability of the battery device and ensure safety during use, some embodiments of the present invention provide a battery device in which a reinforcing member is positioned below the liquid cooling plate to provide structural reinforcement to the liquid cooling plate. Above the reinforcing member is the liquid cooling plate, and the cells are located above the liquid cooling plate. The structural design of the reinforcing member reduces material costs while ensuring support stability. The reinforcing member reinforces the structure of the liquid cooling plate, preventing problems such as leakage and deformation from occurring when the liquid cooling plate is subjected to load from the cells.

[0032] The structure of a battery device according to several embodiments of the present invention will be described below with reference to Figures 1 to 7.

[0033] As shown in Figures 1 to 7, a battery device according to some embodiments of the present application includes a liquid cooling plate 11, a cover 12, a plurality of cells 13, and a plurality of reinforcing members 14. The cover 12 covers the liquid cooling plate 11. The plurality of cells 13 are located on the liquid cooling plate 11 and inside the cover 12. The plurality of reinforcing members 14 are connected to the liquid cooling plate 11 and are located on the side of the liquid cooling plate 11 away from the cover 12. The reinforcing members 14 extend along a first direction (the direction shown by arrow A in Figure 1), and the reinforcing members 14 have a plurality of grooves 141 that extend along the first direction and are arranged along a second direction (the direction shown by arrow B in Figure 1) that intersects the first direction.

[0034] The liquid cooling plate 11 is a part of the battery device that plays a role in heat dissipation and on which cells 13 can be mounted. The liquid cooling plate 11 may be provided with multiple via holes and fixed to the bottom of the cover 12 by fastening members. The liquid cooling plate 11 includes a front and a back that are opposite each other, and different cells 13 are mounted on the front. The back of the liquid cooling plate 11 is separated from the cover 12 and structural reinforcement can be performed by providing a reinforcing member 14.

[0035] The liquid cooling plate 11 has a complete flow path, and after entering the flow path, the coolant flows through different regions within the liquid cooling plate 11, removing heat generated by the cell 13 during operation, and can flow out of the liquid cooling plate 11 along the complete path. The complete flow path for the coolant may further include a liquid inlet connection port 111 and a liquid outlet connection port 112. The liquid inlet connection port 111 communicates with one end of the flow path where the coolant inlet is located, and introduces external coolant into the liquid cooling plate 11. The liquid outlet connection port 112 communicates with the other end of the flow path where the coolant outlet is located, and leads the coolant flowing inside the liquid cooling plate 11 to the outside of the liquid cooling plate 11. As the coolant, liquids such as water, deionized water, aqueous propylene glycol solution, or aqueous ethylene glycol solution may be used.

[0036] The cover 12 can form a package case for the battery device and protect the internal cells 13. The cover 12 fits with the liquid cooling plate 11, and the interior of the cover 12 can provide a space for housing multiple cells 13 or a battery module 130 formed by connecting multiple cells 13. The cover 12 may be provided with a circuit interface for connecting the battery device to the circuit of an energy storage device or power consumption device. To improve the structural strength at the edge of the liquid cooling plate 11, a surrounding structure may be provided between the cover 12 and the liquid cooling plate 11 by joining. As shown in Figure 1, the bottom of the cover 12 may be provided with an enclosure frame 121 formed by connecting the ends of multiple strip-shaped members, the top side of the enclosure frame 121 being joined to the cover 12, and the bottom side of the enclosure frame 121 being joined to the liquid cooling plate 11 to form a complete housing structure. The enclosure frame 121 can be combined with other members when the battery device is installed, and the multiple cells 13 are supported by the liquid cooling plate 11 at the bottom and the enclosure frame 121.

[0037] Cell 13 is a key component in the battery device, playing a role in energy storage. Multiple cells 13 may be arranged in a specific number along parallel directions to each other to ensure the stability of the assembled structure. The number of battery modules 130 formed by multiple cells 13 may be one or more, and the battery device shown in Figure 1 has four rows of cells 13 arranged simultaneously. To achieve efficient use of space and improve the capacity of the battery device, rectangular shell secondary batteries can be used for the cells 13. An insulating pad may be provided between two adjacent cells 13 arranged along the same direction, blocking the heat transfer process in the thickness direction of the cell 13 and preventing thermal runaway phenomena occurring in some cells 13 from propagating to other adjacent cells 13. An insulating pad may also be provided between two adjacent rows of cells 13 to block the heat transfer process on the smaller side surface of the cell 13. The top and bottom surfaces of the cell 13 are two surfaces in the height direction of the cell 13, and the top surface of the cell 13 has a positive and negative electrode post structure and an explosion-proof valve structure. The positive and negative electrode post structures correspond to the positive and negative electrodes of cell 13, respectively, and allow cell 13 to be connected in the form of connecting cables or connecting sheets. The explosion-proof valve structure corresponds to the pressure release portion of cell 13 and, by forming a pressure release passage in special circumstances, can prevent safety hazards during the operation of cell 13.

[0038] Multiple cells 13 may be connected in series or parallel by a CCS assembly to enable current transmission or operational data acquisition. For example, the CCS assembly may collect the temperature of the cells 13 using a thermistor, or collect data such as the voltage of the cells 13, thereby facilitating monitoring of the state of the cells 13. The acquisition assembly may be connected to the top posts of the cells 13 using aluminum busbars, which are welded to the posts of the cells 13 to collect operational data from each cell 13. The acquisition assembly can further transmit the collected data from each cell 13 to a battery management unit via a line formed by a cable or a flexible circuit board.

[0039] The first direction is the direction in which the reinforcing member 14 extends and is parallel to the longitudinal direction of the reinforcing member 14. The reinforcing member 14 provides structural reinforcement on the back side of the liquid cooling plate 11, away from the cells 13. The reinforcing member 14 can support the back of the liquid cooling plate 11 and share the load of the cells 13 on the liquid cooling plate 11. The reinforcing member 14 may be made of a high-strength metal material, and a coating layer may be further provided on the surface of the reinforcing member 14 to avoid damage such as scratches. The reinforcing member 14 is further provided with grooves 141 extending along the first direction, and a plurality of grooves 141 are arranged along the second direction. The second direction may intersect the first direction, be perpendicular to the first direction, or have an acute or obtuse angle with the first direction. The grooves 141 can help distribute the load and improve the support strength by forming the reinforcing member 14 with an uneven shape. Both ends of the reinforcing member 14 are connected to the liquid cooling plate 11, allowing it to perform structural reinforcement along the entire longitudinal or widthwise direction of the liquid cooling plate 11. In practice, the reinforcing member 14, the liquid cooling plate 11, and the cover 12 can be integrated by connecting the reinforcing member 14 and the liquid cooling plate 11 using fastening members. That is, the liquid cooling plate 11 and the cover 12 are connected and fixed to both sides of the enclosure frame 121, and then the reinforcing member 14 is fixed to its position using fastening members, thereby connecting the reinforcing member 14 and the liquid cooling plate 11. The placement of the reinforcing member 14 can be achieved without affecting the fitting structure between the liquid cooling plate 11 and the cover 12.

[0040] The battery device supports multiple cells 13 on a liquid cooling plate 11, and one side of the liquid cooling plate 11 is supported by a reinforcing member 14. The reinforcing member 14 has a groove 141 extending in a first direction, and the groove 141 has an uneven cross-section that can distribute and cancel out the load. Furthermore, by providing and supporting multiple reinforcing members 14 on one side of the liquid cooling plate 11, structural reinforcement is performed at multiple locations, preventing problems such as liquid leakage and deformation from occurring in the liquid cooling plate 11 due to the load from the cells 13, thereby improving the structural stability of the battery device and ensuring safety during use.

[0041] In some embodiments, the dimensions of the reinforcing member 14 in the second direction may be between 10 mm and 1000 mm.

[0042] The dimensions of the reinforcing member 14 in the second direction correspond to the width of the reinforcing member 14. By controlling the width range of the reinforcing member 14, material can be saved while ensuring the strength of the reinforcing member 14 itself. This avoids the situation where the reinforcing member 14 cannot provide a high reinforcing effect on the liquid cooling plate 11 due to its small width, and also avoids the waste of material due to the large width of the reinforcing member 14. In practice, the dimensions of the reinforcing member 14 in the second direction may be 10mm to 200mm, 200mm to 400mm, 400mm to 600mm, 600mm to 800mm, or 800mm to 1000mm, for example, 10mm, 15mm, 20mm, 50mm, 100mm, 300mm, 600mm, 900mm, or 1000mm.

[0043] As shown in Figures 2 and 4, the reinforcing member 14 may have a plurality of recesses 142 formed along the first direction, and the recesses 142 are spaced apart from the liquid cooling plate 11 and are provided adjacent to the groove 141.

[0044] The recess 142 is provided adjacent to the groove 141, and the groove 141 is formed by the reinforcing member 14 being recessed on the side away from the liquid cooling plate 11. The recess 142 is formed by the contact portion adjacent to the groove 141 being recessed on the side away from the liquid cooling plate 11, and the recess 142 and the liquid cooling plate 11 form a certain distance apart, and the portion on the back side of the reinforcing member 14 that is in close contact with the liquid cooling plate 11 protrudes. Multiple recesses 142 are formed in the reinforcing member 14 along the first direction, and the recesses 142 can increase the structural strength at the location where they are located and avoid stress concentration phenomena.

[0045] Furthermore, the recesses 142 are provided in accordance with the contact portions adjacent to the reinforcing member 14 and the groove 141, and recesses 142 located at different contact portions may be distributed along the second direction. This forms a continuously distributed reinforcing structure, effectively blocking the transmission of stress in the longitudinal direction of the reinforcing member 14 and preventing the reinforcing member 14 from easily deforming.

[0046] In practice, the corresponding flow path regions on the back of the liquid cooling plate 11 have a protruding shape, and the corresponding non-flow path regions have a concave shape; that is, to save on material costs, the flow paths inside the liquid cooling plate 11 may be formed by pressing. Regarding the reinforcing member 14 on the back side of the liquid cooling plate 11, the reinforcing member 14 leaves a space at the location of the recess 142, facilitating the formation of a connection between the recess 142 and the liquid cooling plate 11. By providing a heat conductive plate on the front of the liquid cooling plate 11, the cell 13 can be placed using the flat surface of the heat conductive plate, and the heat from the cell 13 can be transferred to the liquid cooling plate 11.

[0047] Furthermore, there may be two grooves 141, and the recesses 142 may be located between the two grooves 141, or there may be more than two grooves 141, and recesses 142 are formed on both sides of the central groove 141 along the second direction, both along the second direction.

[0048] As shown in Figures 4 and 5, the reinforcing member 14 has a plurality of grooves 141. The number of grooves 141 is two or more, and the recesses 142 are formed corresponding to the contact portions between two adjacent grooves 141. When the number of grooves 141 exceeds two, recesses 142 are formed on both sides of the groove 141 located in the middle along the second direction, and the portion partitioned by the recesses 142 can contact the back surface of the liquid cooling plate 11. That is, recesses 142 are formed along the second direction and form groups in the first direction at the contact portions located in the middle. Recesses 142 are formed on both sides of the groove 141 located in the middle, and the recesses 142 can be continuously distributed in the second direction, allowing partitions formed by different contact portions to be opened, which is advantageous for relief, and furthermore, a continuous accommodating space is formed on the back side of the liquid cooling plate 11, connecting and fixing it with the liquid cooling plate 11 by the intermediate member, improving the connection stability and structural reinforcement effect between the reinforcing member 14 and the liquid cooling plate 11.

[0049] In practice, the number of grooves 141 may be three, four, five, or six. The recesses 142 of the different contact portions may be distributed along the second direction, or along the direction that forms an angle with the second direction.

[0050] As shown in Figures 2 to 4, a plurality of connecting members 113 may be provided on the side of the liquid cooling plate 11 that is close to the reinforcing member 14, and the recess 142 is in close contact with the connecting member 113 and connected to the connecting member 113.

[0051] Specifically, a plurality of connecting members 113 may be provided on the back side of the liquid cooling plate 11, corresponding to the recesses 142 of the reinforcing member 14. The connecting members 113 form a protruding structure on the back side of the liquid cooling plate 11. The recesses 142 of the reinforcing member 14 are in close contact with the connecting members 113 and are fixed to the connecting members 113 by fastening members. By fixing the recesses 142 of the reinforcing member 14 and the connecting members 113 of the liquid cooling plate 11, the tightness of the connection between the reinforcing member 14 and the liquid cooling plate 11 can be improved, and stability when the reinforcing member 14 and the liquid cooling plate 11 are fitted together can be ensured. As shown in Figure 5, mounting holes 1421 may be provided in the recesses 142. The mounting holes 1421 may be for fastening members to pass through in order to connect the recesses 142 and the connecting members 113 via fastening members.

[0052] The connecting member 113 may be made into a rectangular, elongated shape and pre-fixed to the liquid cooling plate 11. The connecting member 113 may have weight-reducing holes to reduce its own weight and lessen the effect of the load it is subjected to on other members.

[0053] As shown in Figures 2 and 3, a protrusion 114 may be provided on the side of the liquid cooling plate 11 away from the cover 12, and the connecting member 113 is located between two adjacent protrusions 114.

[0054] The protrusions 114 correspond to the flow path area of ​​the liquid cooling plate 11. The liquid cooling plate 11 has a flow path formed by pressing, and the protrusions 114 are further formed on the back side. The connecting member 113 is positioned between two adjacent protrusions 114, and by positioning the connecting member 113 using the area between the two adjacent protrusions 114, adverse effects on the flow path area can be avoided. At the same time, the position of the connecting member 113 is limited by the protrusions 114, preventing the connecting member 113 from being easily displaced, and further avoiding affecting the connection effect between the reinforcing member 14 and the liquid cooling plate 11.

[0055] In practice, the width of the connecting member 113 may be smaller than the distance between two adjacent protrusions 114, so as to fix the connecting member 113 between two adjacent protrusions 114.

[0056] Furthermore, a gap may be formed between two adjacent cells 13 along the first direction, and the projection of the recess 142 onto the surface of the liquid cooling plate 11 overlaps with the gap region between two adjacent cells 13 along the first direction.

[0057] Multiple cells 13 may be arranged in a specific number along the second direction, and two adjacent cells 13 in the first direction may be spaced apart to reduce mutual influence between the cells 13. By forming the recess 142 in a manner corresponding to the spacing region between two adjacent cells 13 along the first direction, it is ensured that the segment formed by the recess 142 of the reinforcing member 14 corresponds to the arrangement position of the cells 13, thereby effectively blocking stress transmission and ensuring load sharing effects.

[0058] In practice, the recess 142 may be formed according to the boundary position of the battery module 130 so as to hold the segment of the reinforcing member 14 so as to correspond to the battery module 130, block stress transmission of the reinforcing member 14, and ensure the structural reinforcing effect of the reinforcing member 14 on the liquid cooling plate 11.

[0059] In some embodiments, the multiple recesses 142 may be distributed at equal intervals in the first direction.

[0060] The multiple recesses 142 are uniformly distributed in the longitudinal direction of the reinforcing member 14, thereby providing uniform reinforcement and avoiding large stress differences in different parts of the reinforcing member 14, thus preventing large deformation of the reinforcing member 14. As shown in Figure 4, three sets of reinforcing structures are provided in the longitudinal direction of the reinforcing member 14, and each group of reinforcing structures includes three recesses 142. Multiple recesses 142 located in the same group of reinforcing structures are connected to the same connecting member 113, ensuring connection stability with the liquid cooling plate 11. At the same time, the multiple recesses 142 formed along the same straight line on the back surface of the reinforcing member 14 provide structural reinforcement at multiple different locations, limiting the degree of deformation in different segments of the reinforcing member 14.

[0061] The recesses 142 of the reinforcing member 14 can abut against the connecting member 113 on the back of the liquid cooling plate 11. In practice, the number of recesses 142 may be two, three, four, or five, and the recesses 142 are formed corresponding to recessed areas on the back of the liquid cooling plate 11 and can be adapted for connection and fixing to the connecting member 113 on the back of the liquid cooling plate 11.

[0062] As shown in Figures 1 and 2, a support member 15 may be provided on the side of the liquid cooling plate 11 away from the cover 12, and a support member 15 protruding from the surface of the reinforcing member 14 is provided on at least one side of the reinforcing member 14.

[0063] The support member 15 can perform a supporting function after the battery device is installed. By making the support member 15 protrude from the surface of the reinforcing member 14, the support height of the support member 15 can be secured, and the reinforcing member 14 can avoid affecting the installation and normal use of the battery device. The support member 15 is positioned along both side edges of the liquid cooling plate 11, and when the battery device is installed by a battery holder, it cooperates with the guide rail on the battery holder to easily install the entire battery device into the battery holder and easily remove the entire battery device from the battery holder.

[0064] Furthermore, the support member 15 can be made of plastic to reduce resistance during the movement of the battery device. By providing the support member 15 adjacent to the reinforcing member 14, it can share the load at the location of the reinforcing member 14, thereby reducing the impact of the load on the reinforcing member 14.

[0065] In some embodiments, the reinforcing member 14 may be provided with a through hole 144 that communicates with the groove 141. One end of the through hole 144 faces the liquid cooling plate 11, and the other end of the through hole 144 faces the side of the reinforcing member 14 away from the liquid cooling plate 11.

[0066] The through-hole 144 forms a communication region, allowing substances such as condensation formed in the groove 141 to flow out through the through-hole 144, thus preventing adverse effects such as corrosion on the liquid cooling plate 11 and the reinforcing member 14. The through-hole 144 is positioned corresponding to the location of the groove 141, enabling communication between the inside and outside of the groove 141. For example, the through-hole 144 may be positioned at the bottom of the groove 141 so that substances such as liquids flow out of the groove 141 of the reinforcing member 14. The through-hole 144 may also be positioned in the center of the groove 141, i.e., at an intermediate position in the direction of extension of the groove 141, thereby facilitating the outflow of substances such as liquids from both sides and preventing the concentration of substances such as liquids within the groove 141.

[0067] In practice, negative pressure may be formed in the region of the groove 141, that is, a vacuum or near-vacuum state may be formed in the region between the back surface of the liquid cooling plate 11 and the side wall of the groove 141 of the reinforcing member 14, or negative pressure may be applied inside the space formed by the cover 12 and the liquid cooling plate 11, thereby creating a pressure effect on the reinforcing member 14 due to atmospheric pressure and ensuring the structural reinforcement effect of the reinforcing member 14.

[0068] In some embodiments, the dimensions of the groove 141 in the second direction may be 5 mm to 100 mm.

[0069] The dimensions of the groove 141 in the second direction correspond to the width of the groove 141. By controlling the width of the groove 141, the cross-sectional area of ​​the groove 141 can be controlled, and the support effect of the reinforcing member 14 can be ensured by the groove 141 having a constant cross-sectional area, thereby controlling the dimensions of the reinforcing member 14 and saving on material costs.

[0070] In practice, the width of the groove 141 may be 5mm to 20mm, 20mm to 40mm, 40mm to 60mm, 60mm to 80mm, or 80mm to 100mm, for example, 5mm, 10mm, 30mm, 50mm, 70mm, 90mm, or 100mm.

[0071] Furthermore, the depth of the groove 141 may be 2mm to 20mm. In practice, the depth of the groove 141 may be 2mm to 5mm, 5mm to 10mm, 10mm to 15mm, or 15mm to 20mm, for example, 5mm, 8mm, 11mm, 14mm, 17mm, or 20mm.

[0072] By having the width and depth of the groove 141 within the above range, it is possible to avoid the inability to effectively distribute the load due to its small size, and to avoid the high cost of the reinforcing member 14 due to its large size.

[0073] In practice, since the overall height of the space in which the reinforcing member 14 is located is limited and the adjustable range of the thickness of the reinforcing member 14 is small, the load-bearing capacity of the reinforcing member 14 can be changed by adjusting the width of the groove 141.

[0074] The reinforcing members 14 are divided into edge reinforcing members and middle reinforcing members according to their dimensions from the front and rear side edges of the cover 12. The edge reinforcing members and middle reinforcing members may be uniformly arranged, or the middle reinforcing members may be arranged in close proximity to each other. To save costs, the structure of the reinforcing members 14 at different locations does not need to be distinguished, and they may use the same cross-sectional form and have the same number of grooves 141 and grooves 141 with the same cross-sectional area. In the battery device shown in Figure 1, each reinforcing member 14 has four grooves 141, with a depth of 8 mm and a width of 30 mm. If the width of the grooves 141 is constant, the depth of the grooves 141 can be increased to ensure the bending resistance of the reinforcing member 14.

[0075] In the battery device shown in Figure 1, the total number of grooves 141 in the four reinforcing members 14 is 16, and the sum of the cross-sectional areas of the grooves 141 is approximately 6800 mm². 2 The total weight of the multiple cells 13 is approximately 100 kg to 2000 kg, and the cross-sectional area of ​​the groove 141 is 6 mm per kilogram. 2The design can be carried out in this way. The cross-sectional dimensions of the groove 141 can be appropriately expanded, and the cross-sectional area can be appropriately increased to ensure structural stability. For example, the cross-sectional dimensions of the groove 141 of the reinforcing member 14 can be designed to be 1.5 times the load of the total cells 13.

[0076] In some embodiments, the multiple grooves 141 may be uniformly distributed along the second direction.

[0077] By uniformly distributing multiple grooves 141 along the second direction, the structure of the reinforcing member 14 can be simplified. At the same time, the uniformly distributed grooves 141 distribute the load uniformly, ensuring that the loads received at each recess of the reinforcing member 14 are close together or coincide, thereby avoiding insufficient support of the liquid cooling plate 11 due to smaller load distribution in some areas of the reinforcing member 14.

[0078] Furthermore, the portion between two adjacent grooves 141 corresponds to the portion of the reinforcing member 14 that contacts the liquid cooling plate 11, and the portion of the reinforcing member 14 with grooves 141 is separated from the surface of the liquid cooling plate 11. By making the distance between two adjacent grooves 141 greater than the width of the groove 141, it is possible to ensure that the reinforcing member 14 is supported by a sufficient portion of the surface of the liquid cooling plate 11, and by increasing the number of grooves 141, a load-sharing effect can be ensured.

[0079] As shown in Figures 2 and 4, a bent and extending connecting portion 143 may be provided at the end of the reinforcing member 14, and the connecting portion 143 is in close contact with the edge of the liquid cooling plate 11 and connected.

[0080] The connecting portions 143 are located at both ends of the reinforcing member 14 and are in close contact with the edges of the liquid cooling plate 11, and can be fixed to the liquid cooling plate 11 by fastening members. At the same time, the connecting portions 143 are formed by bending and extending at the ends of the reinforcing member 14, so as to adapt to the height difference between the protruding area at the bottom of the liquid cooling plate 11 and the edge, ensuring that the reinforcing member 14 can be supported on the back side of the liquid cooling plate 11.

[0081] A groove 141 is formed in the portion of the reinforcing member 14 located between the two connecting portions 143 at its end, which engages with the back side of the liquid cooling plate 11. The opening of the groove 141 is close to the back side of the liquid cooling plate 11, and the contact portions of two adjacent grooves 141 abut against the back side of the liquid cooling plate 11. The two connecting portions 143 are fixed to the edge of the liquid cooling plate 11, thereby connecting the reinforcing member 14 and the liquid cooling plate 11.

[0082] In some embodiments, multiple cells 13 can form multiple battery modules 130, and the extending direction of the reinforcing member 14 is parallel to the arrangement direction of the multiple battery modules 130.

[0083] Multiple cells 13 are connected in a fixed number to form multiple battery modules 130, and each of the multiple battery modules 130 has a matching number of cells 13. The battery device shown in Figure 1 includes four battery modules 130, and each battery module 130 contains more cells 13. The multiple battery modules 130 are arranged side by side above the liquid cooling plate 11, and different battery modules 130 are aligned at their ends. The extending direction of the reinforcing member 14 is parallel to the arrangement direction of the multiple battery modules 130; that is, the reinforcing member 14 extends along the arrangement direction of the multiple battery modules 130. Each reinforcing member 14 can share the load from different battery modules 130, thereby ensuring a support effect on the liquid cooling plate 11. Furthermore, by supporting the liquid cooling plate 11 in a relatively short direction, sagging or deformation of the middle portion due to the reinforcing member 14 being too long can be avoided.

[0084] Some embodiments of the present application further provide energy storage devices including the battery device for storing electrical energy.

[0085] Energy storage devices include, but are not limited to, household energy storage cabinets, commercial energy storage cabinets, energy storage containers, energy storage power plants, energy storage battery devices, or portable energy storage systems. Energy storage devices may further include energy management systems (EMS), battery management systems (BMS), and power conversion systems (PCS).

[0086] Some embodiments of the present application further provide a power consumption device including the battery device that supplies electrical energy.

[0087] Power-consuming devices include, but are not limited to, mobile phones, tablets, laptop computers, electric toys, power tools, electric vehicles, electric cars, ships, and spacecraft. Electric toys may include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, and spacecraft may include airplanes, rockets, space shuttles, and spacecraft.

[0088] Those skilled in the art will understand that the above embodiments are specific examples of realizing the present application, and that in actual application, various modifications can be made to the form and details without departing from the spirit and scope of the present application.

Claims

1. Liquid cooling plate and A cover placed over the aforementioned liquid cooling plate, A plurality of cells located on the liquid cooling plate and inside the cover, It includes a plurality of reinforcing members connected to the liquid cooling plate and located on the side of the liquid cooling plate away from the cover, Each of the reinforcing members extends along the first direction, Each of the reinforcing members has at least three grooves extending along the first direction, and a contact portion formed between two adjacent grooves that abuts against the liquid cooling plate. The grooves and the contact portions are connected to each other so as to be arranged alternately along a second direction that intersects the first direction. A battery device characterized by the following features.

2. The dimensions of the reinforcing member in the second direction are 10 mm to 1000 mm. The battery device according to feature 1.

3. The reinforcing member has a plurality of recesses formed along the first direction, The recess is provided adjacent to the groove, with a gap between it and the liquid cooling plate. The battery device according to feature 1.

4. There are two grooves, and the recess is located between the two grooves, or The grooves are more than two in number, and on both sides of the groove located in the center along the second direction, recesses are formed that are also provided along the second direction. The battery device according to feature 3.

5. Multiple connecting members are provided on the side of the liquid cooling plate that is close to the reinforcing member. The recess is in close contact with the connecting member and connected to the connecting member. The battery device according to feature 4.

6. A protrusion is provided on the side of the liquid cooling plate that is away from the cover. The connecting member is located between two adjacent protrusions. The battery device according to feature 5.

7. A gap is formed between two adjacent cells along the first direction. The projection of the recess onto the surface of the liquid cooling plate overlaps with the spacing region between two adjacent cells along the first direction. The battery device according to feature 3.

8. A support member is provided on the side of the liquid cooling plate away from the cover. The support member is provided on at least one side of the reinforcing member, protruding from the surface of the reinforcing member. The battery device according to feature 1.

9. The reinforcing member has a through hole that communicates with the groove, One end of the through-hole faces the liquid cooling plate, and the other end of the through-hole faces the side of the reinforcing member away from the liquid cooling plate. The battery device according to feature 1.

10. The dimensions of the groove in the second direction are 5 mm to 100 mm. The battery device according to feature 1.

11. The multiple grooves are uniformly distributed along the second direction. The battery device according to feature 1.

12. The end of the reinforcing member is provided with a bending and extending connecting portion. The aforementioned connection portion is connected in close contact with the edge of the liquid cooling plate. The battery device according to feature 1.

13. Multiple of the aforementioned cells form multiple battery modules. The extending direction of the reinforcing member is parallel to the arrangement direction of the plurality of battery modules. The battery device according to feature 1.

14. A battery device for storing electrical energy, as described in any one of claims 1 to 13, An energy storage device characterized by the following features.

15. Includes a battery device according to any one of claims 1 to 13 that supplies electrical energy, A power consumption device characterized by the following features.

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