Battery device, energy storage device and power utilization device

Abstract

The utility model discloses a battery device, an energy storage device and a power utilization device, and relates to the technical field of batteries, and the battery device comprises a battery box, a plurality of battery cells and a cold plate. The battery box comprises a first box body and a second box body, a first plate body of the first box body and a second plate body of the second box body are oppositely arranged in a spaced mode in the first direction, and a containing space is formed between the first plate body and the second plate body; the cold plate and the multiple battery cells are all located in the containing space, at least two battery cells are arranged in the first direction to form a battery cell column, the walls, with the largest areas, of the adjacent battery cells in the same battery cell column are correspondingly arranged, the end, in the first direction, of the battery cell column faces the first plate body, and the other end, in the first direction, of the battery cell column faces the second plate body; the cold plate is parallel to the first direction, battery cell columns are distributed on the two opposite sides of the cold plate, and the cold plate is in heat conduction fit with the battery cell columns on the two opposite sides of the cold plate; the cold plate is fixedly connected with the first plate body and the second plate body. According to the scheme, the cell distribution density can be improved, so that the energy storage density of the battery device is improved.

Description

TECHNICAL FIELD

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

[0002] New energy battery devices have the characteristics of storing energy or releasing energy according to needs, and are more and more widely used in various power utilization devices and energy storage devices.

[0003] The battery device is usually provided with a battery box and a battery cell, and the battery cell is accommodated in the battery box. The energy storage density of the battery device is closely related to the distribution density of the battery cell in the battery box. In the related art, when the height of the battery box is increased, the space that is added due to the increase in height in the battery box cannot be fully and reasonably utilized, which limits the distribution density of the battery cell in the battery box, thereby affecting the energy storage density of the battery device.

[0004] The information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those of ordinary skill in the art. CONTENT OF THE INVENTION

[0005] The purpose of the embodiments of the present application is to provide a battery device, an energy storage device and a power utilization device, which can improve the distribution density of the battery cell in the battery box, thereby improving the energy storage density of the battery device.

[0006] The embodiments of the first aspect of the present application provide a battery device, comprising: a battery box, comprising a first box body and a second box body, the first box body is connected with the second box body and encloses a containing space, the first box body comprises a first plate body, the second box body comprises a second plate body, the first plate body and the second plate body are oppositely and spaced apart along a first direction, and the containing space is located between the first plate body and the second plate body; a plurality of battery cells located in the containing space, at least two battery cells are arranged to form a battery cell column along the first direction, the areas of adjacent battery cells in the same battery cell column correspondingly have maximum walls, one end of the battery cell column along the first direction faces the first plate body, and the other end of the battery cell column along the first direction faces the second plate body; a cold plate located in the containing space, the cold plate is arranged parallel to the first direction, the cold plate has battery cell columns distributed on opposite sides thereof, and the cold plate is in heat conduction cooperation with the battery cell columns on the opposite sides thereof; and the cold plate is connected and fixed with the first plate body and the second plate body respectively.

[0007] In the embodiments of the present application, the size of the cell column in the first direction can be flexibly adjusted based on the number of cells in the same cell column, so that the size of the cell column in the first direction can adapt to the height dimension in the battery box, so that the cell column can be used to fully occupy the space in the height direction of the battery box, thereby improving the utilization of the space in the battery box. By stacking the cells in the cell column in the form of area-maximum wall corresponding to area-maximum wall, the cells themselves can bear the load in the first direction without the need for additional supports between the cells in the cell column, thereby reducing the space waste between adjacent cells in the cell column and improving the cell distribution density in the cell column. By arranging the cold plate in the receiving space parallel to the first direction, and arranging the cell columns on the opposite sides of the cold plate, the cold plate can be used to heat manage each cell in the cell columns on the opposite sides of the cold plate, thereby meeting the heat management requirements of each cell while saving the number of cold plates and reducing the space waste in the battery box. In summary, the structure of the present embodiment not only improves the compactness of the cell arrangement in the battery box, but also reduces the space waste between adjacent cells in the cell column and saves the number of cold plates to reduce the space waste in the battery box, thereby efficiently improving the cell distribution density in the battery box and improving the energy storage density of the battery device.

[0008] Based on the structure that the cold plate is connected and fixed with the first plate body and the second plate body respectively, the connection strength between the first box body and the second box body can be further improved. When the first plate body and the second plate body bear the expansion force of the cells in the cell column, the cold plate limits the first plate body and the second plate body from moving away from each other, thereby reducing the risk of the first box body and the second box body being pushed apart by the expansion force.

[0009] According to some embodiments of the present application, the end of the cold plate towards the second plate body or the first plate body has a first end portion, the second plate body or the first plate body is provided with a plurality of first through holes at a position corresponding to the first end portion, the first through holes are arranged at intervals, and a fastener is arranged in each first through hole. The fastener in the first through hole connects and fixes the second plate body or the first plate body with the first end portion.

[0010] Since the cold plate is arranged between different cell columns, by connecting the first end portion of the cold plate towards the second plate body or the first plate body with the second plate body or the first plate body, the connection position of the cold plate and the second plate body or the first plate body is closer to the cell columns on both sides of the cold plate. In this way, the expansion force of the cell columns on both sides of the cold plate is closer to the connection position of the cold plate and the second plate body or the first plate body, and the restriction effect of the expansion force of the cell columns on both sides of the cold plate is better.

[0011] According to some embodiments of the present application, optionally, one end of the electric core has a pole post, in the electric core column on the opposite sides of the cold plate, each electric core is arranged with the end of the pole post away from the cold plate, and the end of the electric core away from the pole post is arranged towards the cold plate and is in heat conduction with the cold plate.

[0012] Arranging the end of the electric core with the pole post away from the cold plate, and arranging the end of the electric core away from the pole post towards the cold plate and in heat conduction with the cold plate, can make the pole post of the electric core avoid the cold plate and other electric core columns, so as to facilitate the more compact arrangement of the electric core in the battery box, thereby further improving the density of the electric core in the battery box and the energy storage density.

[0013] According to some embodiments of the present application, optionally, a plurality of electric core columns are distributed on the opposite sides of the cold plate, and the plurality of electric core columns on the same side of the cold plate are arranged along a second direction to form an electric core column matrix, and the second direction is parallel to the cold plate and perpendicular to the first direction, and each electric core column of the electric core column matrix is in heat conduction with the cold plate.

[0014] By distributing a plurality of electric core columns on each of the opposite sides of the cold plate, and arranging the plurality of electric core columns on the same side of the cold plate along the second direction to form an electric core column matrix, the plurality of electric core columns are regularly arranged in the second direction and the direction perpendicular to the cold plate, so that more electric cores can be accommodated in the battery box, and the distribution density of the electric cores in the battery box is improved, thereby improving the energy storage density of the battery device.

[0015] According to some embodiments of the present application, optionally, the battery device further comprises: end plates located in the accommodation space, and the electric core column matrix is provided with the end plates at both ends along the second direction.

[0016] By connecting the two end plates with the electric core column matrix at both ends along the second direction, the connection strength of the electric cores in the electric core column matrix can be further improved by connecting the end plates with the electric core column matrix at the end positions along the second direction, and the end plates can be used for connecting and fixing the output pole tab and copper bar, thereby providing more possibilities for the structural arrangement of the product.

[0017] According to some embodiments of the present application, optionally, a first structural adhesive layer is arranged between adjacent electric core columns arranged along the second direction.

[0018] The adjacent electric core columns along the second direction can be connected as a whole, the relative shaking between the electric cores is reduced, and the structural strength is improved.

[0019] According to some embodiments of the present application, optionally, a second structural adhesive layer is arranged between adjacent electric cores in the same electric core column along the first direction.

[0020] The battery cells in the battery cell column can be connected as a whole, the relative shaking between the battery cells is reduced, and the structural strength is improved.

[0021] According to some embodiments of the present application, optionally, a third structural adhesive layer is arranged between the surface of the battery cell column facing the first plate body and the first plate body; and / or a fourth structural adhesive layer is arranged between the surface of the battery cell column facing the second plate body and the second plate body.

[0022] The third structural adhesive layer arranged between the surface of the battery cell column facing the first plate body and the first plate body, and / or the fourth structural adhesive layer arranged between the surface of the battery cell column facing the second plate body and the second plate body, can facilitate the connection of the battery box and each battery cell column in the battery box as a whole through the third structural adhesive layer and the fourth structural adhesive layer, and can improve the consistency of the main frequency of the battery device.

[0023] According to some embodiments of the present application, optionally, two or more battery cell columns are distributed on the same side of the cold plate; the battery device further comprises a support beam, the support beam is located in the accommodation space, and the support beam is arranged between at least one adjacent battery cell column on the same side of the cold plate, one end of the support beam along the first direction is arranged towards the first plate body and is connected and fixed with the first plate body, and the other end of the support beam along the first direction is arranged towards the second plate body and is connected and fixed with the second plate body.

[0024] By connecting and fixing the support beam with the first plate body and the second plate body respectively, the connection strength between the first box body and the second box body can be improved, and when the second plate body and the first plate body bear the expansion force of the battery cells in the battery cell column, the risk of the second plate body and the first plate body being pushed open by the expansion force can be reduced.

[0025] By arranging the support beam at the position between at least one adjacent battery cell column on the same side of the cold plate, and by connecting and fixing the support beam with the first plate body and the second plate body respectively, the fulcrum span between the first plate body and the second plate body can be reduced, thereby reducing the deformation amount of the first plate body and the second plate body when they bear the expansion force of the battery cells, and reducing the damage risk of the first plate body and the second plate body.

[0026] According to some embodiments of the present application, optionally, the support beam comprises: a first wing plate; a second wing plate, arranged opposite to the first wing plate; a web plate, located between the first wing plate and the second wing plate and connected with the first wing plate and the second wing plate respectively, the web plate separates at least one adjacent battery cell column on the same side of the cold plate, the first wing plate is arranged towards the first plate body and is connected and fixed with the first plate body, and the second wing plate is arranged towards the second plate body and is connected and fixed with the second plate body.

[0027] By setting the support beam to include the first wing plate, the second wing plate, and the web plate between the first wing plate and the second wing plate, the support beam is substantially in the shape of an I-beam, the strength of the support beam itself is higher, the connection strengthening effect of the support beam on the first plate body and the second plate body can be further improved, and the limiting effect of the first plate body and the second plate body on the expansion force can be further improved.

[0028] According to some embodiments of the present application, optionally, the first plate body has a first groove on the surface facing the accommodation space, the first groove is arranged in position corresponding to the first wing plate, and accommodates the first wing plate; and the second plate body has a second groove on the surface facing the accommodation space, the second groove is arranged in position corresponding to the second wing plate, and accommodates the second wing plate.

[0029] The first groove is arranged on the first plate body to accommodate the first wing plate, so that the first wing plate does not additionally occupy the height dimension of the battery box, the occupation of the support beam on the accommodation space can be reduced, the energy storage density is improved, at the same time, the thickness of the first wing plate is not limited by the height dimension of the battery box, so that the first wing plate can be made thicker to meet the strength requirement of the support beam.

[0030] The second groove is arranged on the second plate body to accommodate the second wing plate, so that the second wing plate does not additionally occupy the height dimension of the battery box, the occupation of the support beam on the accommodation space can be reduced, the energy storage density is improved, at the same time, the thickness of the second wing plate is not limited by the height dimension of the battery box, so that the second wing plate can be made thicker to meet the strength requirement of the support beam.

[0031] According to some embodiments of the present application, optionally, the surface of the first plate body away from the accommodation space has a plurality of second through holes, the plurality of second through holes penetrate to the inner bottom surface of the first groove and communicate with the first groove, a fastener is arranged in the second through hole, and the fastener in the second through hole connects and fixes the first plate body and the first wing plate in the first groove; and / or the surface of the second plate body away from the accommodation space has a plurality of third through holes, the plurality of third through holes penetrate to the inner bottom surface of the second groove and communicate with the second groove, a fastener is arranged in the third through hole, and the fastener in the third through hole connects and fixes the second plate body and the second wing plate in the second groove.

[0032] Both the occupation of the first wing plate and / or the second wing plate on the height space in the battery box is reduced, and the connection and fastening between the first plate body and the first wing plate and / or the connection and fastening between the second plate body and the second wing plate are realized.

[0033] According to some embodiments of the present application, optionally, the support beam is arranged on both opposite sides of the cold plate, and the support beams on the opposite sides of the cold plate are arranged in position corresponding to each other.

[0034] The support beams are arranged on opposite sides of the cold plate, so that the first plate body and the second plate body are further connected through the support beams at positions on the opposite sides of the cold plate, thereby further improving the structural strength of the battery box, so that the first plate body and the second plate body can more reliably bear the expansion force.

[0035] By correspondingly arranging the support beams on the opposite sides of the cold plate, the stress distribution on the first plate body and the second plate body can be more uniform, thereby improving the limiting effect of the first plate body and the second plate body on the expansion force.

[0036] According to some embodiments of the present application, optionally, the first box body can include a first plate body and a frame, the first plate body is connected with the frame, and the first plate body shields an opening at one end of the frame, the other end of the frame has a second end portion and an opening surrounded by the second end portion, the second plate body of the second box body covers the second end portion and the opening surrounded by the second end portion, wherein the second plate body is provided with a plurality of fourth through holes at a position corresponding to the second end portion, the plurality of fourth through holes are arranged at intervals, and a fastener is arranged in each fourth through hole, and the fastener in the fourth through hole connects and fixes the second plate body and the second end portion.

[0037] By arranging the second end portion of the frame to be connected with the second plate body, the connection position of the second end portion of the frame and the second plate body is approximately located at the edge of the second plate body, in combination with the structure of the cold plate connected with the first plate body and the second plate body and the structure of the support beam connected with the first plate body and the second plate body, so that the cold plate and the support beam are connected with the first plate body and the second plate body, thereby reducing the fulcrum span of the connection position of the edge of the second plate body and the frame, thereby reducing the deformation amount of the second plate body and the first plate body when bearing the expansion force, and reducing the risk of damage to the cover body.

[0038] According to some embodiments of the present application, optionally, one or both of the first plate body and the second plate body is a profiled plate.

[0039] Arranging one or both of the first plate body and the second plate body to be a profiled plate can improve the structural strength of the first plate body and / or the second plate body, so that the first plate body and / or the second plate body can more reliably bear the expansion force, thereby improving the reliability of the product.

[0040] According to some embodiments of the present application, optionally, the profiled plate is internally formed with a plurality of cavity portions and a plurality of solid portions, the plurality of cavity portions and the plurality of solid portions are arranged alternately in a direction perpendicular to the first direction, and the through holes of the profiled plate for arranging the fasteners are all arranged on the solid portions.

[0041] By arranging the through holes (such as the first through hole and / or the second through hole and / or the third through hole and / or the fourth through hole) for penetrating the fasteners on the profiled plate on the solid portion, the structural strength of the profiled plate at the position connected by the fasteners can be improved, and the risk of connection failure between the first box body and the second box body can be reduced.

[0042] According to some embodiments of the present application, one or both of the first plate body and the second plate body is a die-cast plate.

[0043] By arranging one or both of the first plate body and the second plate body as a die-cast plate, the structural strength of the first plate body and / or the second plate body can be improved, so that the first plate body and / or the second plate body can more reliably bear the expansion force, improving the reliability of the product.

[0044] According to some embodiments of the present application, the die-cast plate has a plurality of first ribs and a plurality of second ribs on one side surface, the first ribs form closed or unclosed annular columns, the through holes for penetrating the fasteners on the die-cast plate are arranged corresponding to the annular columns, and the plurality of second ribs are arranged staggered and connected with the first ribs.

[0045] The annular columns formed by the first ribs and the cavities formed by the plurality of second ribs arranged staggered can have an effect similar to a mold cavity, so that by increasing the volume of the die-cast plate without excessively increasing the weight of the die-cast plate, the structural rigidity of the die-cast plate can be improved, thereby improving the strength reliability of the first plate body and / or the second plate body. By connecting the second ribs with the first ribs to strengthen the closed or unclosed annular columns formed by the first ribs, the structural strength of the die-cast plate at the position connected by the fasteners can be improved, and the risk of connection failure between the first box body and the second box body can be reduced.

[0046] The embodiments of the second aspect of the present application provide a battery device.

[0047] Since the battery device includes the above-mentioned battery device, the battery device can improve the distribution density of the battery cells in the battery box, so that the battery device can achieve a higher energy storage density, and therefore, the battery device can have a higher energy storage density.

[0048] The embodiments of the third aspect of the present application provide a battery device.

[0049] Since the battery device includes the above-mentioned battery device, the battery device can improve the distribution density of the battery cells in the battery box, so that the battery device can achieve a higher energy storage density, and therefore, the battery device can have a higher energy storage density.

[0050] Additional aspects and advantages of the embodiments of the present application will be in part apparent and in part pointed out below in the description of the embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0051] The above and / or additional aspects and advantages of the embodiments of the present application will become apparent and be readily appreciated from the following description of the embodiments of the present application, taken in conjunction with the accompanying drawings.

[0052] Figure 1 FIG. 1 is a structural schematic view of a vehicle of one or more embodiments.

[0053] Figure 2 FIG. 2 is a perspective exploded structural schematic view of a battery device of one or more embodiments.

[0054] Figure 3 FIG. 3 is a perspective structural schematic view of a battery cell of one or more embodiments.

[0055] Figure 4 FIG. 4 is a perspective exploded structural schematic view of a battery cell of one or more embodiments.

[0056] Figure 5 FIG. 5 is an exploded structural schematic view of a battery device of one or more embodiments.

[0057] Figure 6 FIG. 6 is a perspective structural schematic view of a battery device of one or more embodiments.

[0058] Figure 7 FIG. 7 is a structural schematic view of Figure 6 FIG. 8 is an enlarged structural schematic view of the A portion shown in FIG. 7.

[0059] Figure 8 FIG. 9 is an exploded structural schematic view of a battery device of one or more embodiments.

[0060] Figure 9 FIG. 10 is a perspective structural schematic view of a battery device of one or more embodiments.

[0061] Figure 10 FIG. 11 is a partial cross-sectional structural schematic view of a battery device of one or more embodiments.

[0062] Figure 11 FIG. 12 is a structural schematic view of a second case of one or more embodiments.

[0063] Figure 12 FIG. 13 is a structural schematic view of a second case of one or more embodiments.

[0064] REFERENCE NUMERALS:

[0065] 1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, battery cell; 11, shell; 111, end cover; 112, housing; 12, electrode assembly; 121, tab; 13, pole; 14, pressure relief structure; 15, largest area wall; 20, battery box; 21, first box body; 211, second end; 212, opening; 213, first plate body; 214, first groove; 215, frame; 22, second box body; 221, first through hole; 222, fourth through hole; 223, second groove; 224, cavity part; 225, solid part; 226, first rib; 227, second rib; 228, second through hole; 229, third through hole; 31, battery cell column; 32, battery cell column matrix; 40, cold plate; 41, first end; 50, support beam; 51, first wing plate; 52, second wing plate; 53, web; 60, end plate; 70, fastener. DETAILED DESCRIPTION

[0066] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments of the present application. Examples of the embodiments are shown in the drawings, in which the same or similar notations represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation on the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0067] The terms "first", "second", and the like in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are usually a class, and do not limit the number of objects, for example, the first object can be one or more. In addition, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / ", generally indicates that the front and rear associated objects are in a "or" relationship.

[0068] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "center", "first direction", "second direction", "length", "width", "thickness", "height", "lower", "upper", "top", "bottom", "inner", "outer" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0069] In the description of the present application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium, or it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0070] The following is a summary of the embodiments of the present application.

[0071] New energy battery devices have the characteristics of storing and releasing energy as needed, and are widely used in various power consumption devices and energy storage devices. For example, battery devices can be used in energy storage devices of water power, thermal power, wind power and solar power plants, and can also be used in various power consumption devices, such as electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. And with the continuous expansion of the application field of battery devices, the market demand is also increasing.

[0072] In the related art, the battery device usually has a battery core and a battery box, and the battery core is contained in the battery box. Generally, the battery core is arranged in a single layer in the battery box. In some possible solutions, in order to meet the higher power demand, the height dimension of the battery box is made higher, however, the height of a single battery core is limited, and in the case of increasing the height of the battery box, the structure of the single-layer arrangement of the battery core cannot fully utilize the height space in the battery box. In view of this, in the related art, the battery core in the battery box is stacked into multiple layers along the height direction of the battery box, wherein each battery core in each layer is arranged in a standing manner, and the battery cores in each layer are arranged in a horizontal direction, and a support is arranged between the adjacent two layers of battery cores, the support is used to support the battery core of the upper layer, and a thermal management member is arranged on the support to control the temperature of the battery core supported by the support. This structure more fully utilizes the height direction space in the battery box, but the support and the thermal management member between the adjacent two layers of battery cores also increase the consumption of the space in the battery box, thereby affecting the energy storage density of the battery device.

[0073] To alleviate the above problems, embodiments of the present application provide a battery device, the battery device comprising a plurality of battery cells arranged in a battery box, and the battery cells are arranged in a lying manner and stacked along a height direction of the battery box, so that the maximum wall of the adjacent battery cells stacked along the height direction correspond to each other. Since the stacking height of the battery cells can be flexibly controlled by the number of stacked battery cells, the height dimension in the battery box can be matched by controlling the stacking height of the battery cells, so as to fully utilize the space in the height direction of the battery box. Since the battery cells are arranged in a lying manner, the lying battery cells can bear the weight by themselves, so that a support is not needed. By arranging the cold plate substantially parallel to the stacking direction of the lying battery cells, that is, the cold plate is substantially parallel to the height direction of the battery box, and the cold plate is located between two columns of battery cells stacked along the height direction of the battery box, each battery cell in each column can be temperature controlled by the cold plate, so that a thermal management component is not needed between the adjacent stacked battery cells, the problem of the support or thermal management component occupying the height space of the battery box between the adjacent battery cell layers is solved, and the two adjacent columns of battery cells share the cold plate for temperature control, which also saves the number of cold plates, thereby improving the energy storage density of the battery device.

[0074] The battery device disclosed in the embodiments of the present application can be used in an electric device such as a vehicle, a ship or an aircraft, but is not limited thereto. The battery device disclosed in the present application can be used to form a power supply system of the electric device, so as to reduce the weight of the electric device.

[0075] The embodiments of the present application provide an electric device using the battery device as a power supply. The electric device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0076] The following embodiments take a vehicle 1000 as an example for convenience of description.

[0077] Please refer to Figure 1 , Figure 1A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, a new energy vehicle, or a heavy truck. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation and driving.

[0078] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Please refer to Figure 2 , Figure 2 A three-dimensional exploded structural schematic diagram of the battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a battery box 20 and a battery cell 10, and the battery cell 10 is accommodated in the battery box 20. The battery box 20 can accommodate the battery cell 10 and can also be used for protection of the battery cell 10. The structural form of the battery box 20 can be various.

[0080] In some embodiments, as shown in Figure 2 , the battery box 20 can include a first box body 21 and a second box body 22 which are covered with each other. The first box body 21 can be a hollow structure with one end open, so that a part of the accommodation space for accommodating the battery cell 10 is formed in the first box body 21. The second box body 22 can also be a hollow structure with one side open, so that another part of the accommodation space for accommodating the battery cell 10 is formed in the second box body 22, and the open side of the first box body 21 is covered with the open side of the second box body 22.

[0081] In other embodiments, as shown in Figure 5 and Figure 8 , the first box body 21 can be a hollow structure with one end open, and the second box body 22 can be a plate structure, and the second box body 22 covers the open side of the first box body 21.

[0082] Of course, the battery box 20 formed by the second box body 22 and the first box body 21 can have various shapes, such as a cylinder, a cuboid, etc.

[0083] In the battery device 100, the plurality of battery cells 10 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the plurality of battery cells 10 are connected in series and in parallel. Specifically, the battery cell 10 can be a battery monomer or a battery module. The battery module means a module component formed by assembling a plurality of battery monomers.

[0084] In an embodiment, the plurality of battery monomers can be directly connected in series, in parallel, or in a mixed connection, and the plurality of battery monomers can be accommodated in the first case 21. Of course, the battery device 100 can be a plurality of battery monomers connected in series, in parallel, or in a mixed connection to form a battery module, and a plurality of battery modules connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the first case 21. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the plurality of battery monomers.

[0085] Each battery monomer can be a secondary battery or a primary battery, and can be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery monomer can be a cylinder, a flat body, a cuboid, or other shapes.

[0086] The following embodiments are described by taking a battery monomer as an example for convenience of description.

[0087] Please refer to Figure 3 and Figure 4 , Figure 3 for the three-dimensional structure schematic diagram of the battery monomer 10 provided by some embodiments of the application; Figure 4 for the exploded structure schematic diagram of the battery monomer 10 provided by some embodiments of the application.

[0088] The battery monomer means the smallest unit of the battery device 100. As shown in Figure 3 and Figure 4 , the battery monomer includes a shell 11, an electrode assembly 12, and other functional components.

[0089] The shell 11 includes an end cover 111 and a shell body 112.

[0090] The end cover 111 refers to a component that covers the opening of the shell 112 to isolate the internal environment of the battery cell from the external environment. Without limitation, the shape of the end cover 111 can be adapted to the shape of the shell 112 to fit the shell 112. Optionally, the end cover 111 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 111 is not easily deformed when subjected to extrusion collision, so that the battery cell can have higher structural strength and safety performance can also be improved. The end cover 111 can be provided with functional components such as the pole 13. The pole 13 can be used to electrically connect with the electrode assembly 12 for output or input of the electrical energy of the battery cell. In some embodiments, the end cover 111 can also be provided with a pressure relief structure 14 for relieving the internal pressure of the battery cell when the internal pressure or temperature of the battery cell reaches a threshold value. The material of the end cover 111 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not have special limitations. In some embodiments, an insulating member can also be provided on the inner side of the end cover 111, which can be used to isolate the electrical connection components in the shell 11 from the end cover 111 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0091] The shell 112 is a component for fitting the end cover 111 to form the internal environment of the battery cell, wherein the formed internal environment can be used to accommodate the electrode assembly 12, electrolyte and other components. The shell 112 and the end cover 111 can be independent components, and an opening can be provided on the shell 112, and the end cover 111 is covered on the opening to form the internal environment of the battery cell. Without limitation, the end cover 111 and the shell 112 can also be integrated, specifically, the end cover 111 and the shell 112 can form a common connecting surface before other components enter the shell, and when it is necessary to encapsulate the internal environment of the shell 112, the end cover 111 is covered on the shell 112. The shell 112 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the shell 112 can be determined according to the specific shape and size of the electrode assembly 12. The material of the shell 112 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not have special limitations.

[0092] Electrode assembly 12 is the component in a battery cell where electrochemical reactions occur. The casing 11 may contain one or more electrode assemblies 12. Electrode assembly 12 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of electrode assembly 12, while the portions of the positive and negative electrode sheets without active material each constitute tabs 121. The tabs 121 of the positive and negative electrodes may be located together at one end of the main body or separately at both ends of the main body. During the charging and discharging process of the battery, the positive and negative active materials react with the electrolyte, and the tabs 121 connect to the terminals 13 to form a current loop.

[0093] Generally, the battery cell 10 is placed in the first housing 21 either upright or flat (i.e., lying flat). "Upright" placement of the battery cell 10 in the battery housing 20 means that the battery cell 10 is placed with the end cap 111 approximately horizontal. "Flat" placement of the battery cell 10 in the battery housing 20 means that the battery cell 10 is placed with the end cap 111 approximately vertical.

[0094] Firstly, such as Figure 5 As shown, an embodiment of this application provides a battery device 100, including a battery box 20, a plurality of battery cells 10 and a cold plate 40.

[0095] The battery box 20 includes a first box body 21 and a second box body 22. The first box body 21 is connected to the second box body 22, and the first box body 21 and the second box body 22 together enclose an accommodating space. The first box body 21 includes a first plate 213, and the second box body 22 includes a second plate (the second plate can be referred to in this embodiment). Figures 5 to 12 (Understood as the second box 22), the first plate 213 and the second plate are arranged at intervals relative to each other along the first direction, and the accommodating space is located between the first plate 213 and the second plate.

[0096] Multiple battery cells 10 are located within the receiving space, wherein at least two battery cells 10 are arranged along a first direction to form a battery cell array 31. The wall 15 with the largest area of ​​adjacent battery cells 10 within the same battery cell array 31 is correspondingly arranged. One end of the battery cell array 31 along the first direction faces the first plate 213, and the other end of the battery cell array 31 along the first direction faces the second plate. A cold plate 40 is located within the receiving space and is arranged parallel to the first direction. Battery cell arrays 31 are distributed on both opposite sides of the cold plate 40, and the cold plate 40 and the battery cell arrays 31 on opposite sides of the cold plate 40 are thermally connected.

[0097] The battery box 20 is a component used to house the battery cell 10, so as to provide dustproof, waterproof and safety protection for the battery cell 10.

[0098] The electric cell 10 refers to a unit capable of storing and releasing electric energy; the battery device 100 can include two or more electric cells 10, and the specific number of electric cells 10 can be selected according to actual needs, which is not limited herein. Optionally, the electric cell 10 can be a battery monomer or a battery module, wherein the battery module refers to a module component formed by assembling a plurality of battery monomers.

[0099] The area maximum wall 15 of the electric cell 10 refers to the side wall of the side with the maximum surface area of the electric cell 10.

[0100] The first direction, for example Figure 5 As shown in FIG. 1, the plurality of electric cells 10 can be arranged along the S1 direction to form an electric cell column 31.

[0101] The cold plate 40 is a component for thermal management of the electric cell 10. For example, it can be used to transfer heat to the electric cell 10 or take away the heat of the electric cell 10 to control the temperature of the electric cell 10 within a certain range. The cold plate 40 can be a water-cooled plate, for example. Specifically, the water-cooled plate is provided with a flow channel inside, which can be in communication with an external refrigeration device. The heat-carrying medium generated by the external refrigeration device flows in the flow channel and exchanges heat with the electric cell 10 on the outside of the cold plate 40, thereby adjusting the temperature of the electric cell 10. The heat-carrying medium can be a liquid and / or a gas.

[0102] In the embodiment of the present application, the size of the cell column 31 along the first direction can be flexibly adjusted based on the number of cells 10 in the same cell column 31, so that the size of the cell column 31 along the first direction can adapt to the height dimension in the battery box 20, so that the cell column 31 can fully occupy the space in the height direction in the battery box 20, thereby improving the utilization of the space in the battery box 20. By stacking the cells 10 in the cell column 31 in the form of area-maximum wall 15 corresponding to area-maximum wall 15, the cells 10 themselves can bear the load along the first direction without the need for additional supports between the cells 10 in the cell column 31, thereby reducing the space waste between adjacent cells 10 in the cell column 31 and improving the distribution density of the cells 10 in the cell column 31. By arranging the cold plate 40 in the receiving space parallel to the first direction, and arranging the cell columns 31 on the opposite sides of the cold plate 40, the same cold plate 40 can be used to manage the heat of each cell 10 in the cell columns 31 on the opposite sides of the cold plate 40, thereby meeting the heat management requirements of each cell 10 while saving the number of cold plates 40 and reducing the space waste in the battery box 20. In summary, the structure of the present embodiment not only improves the compactness of the arrangement of the cells 10 in the battery box 20, but also reduces the space waste between adjacent cells 10 in the cell column 31 and saves the number of cold plates 40 to reduce the space waste in the battery box 20, thereby efficiently improving the distribution density of the cells 10 in the battery box 20, and further improving the energy storage density of the battery device 100.

[0103] According to some embodiments of the present application, optionally, the first direction can be substantially consistent with the height direction of the battery box 20. Here, the height direction can be the generally understood height direction, or it can also be the direction of gravity, or it can also be the direction opposite to the first box body 21 of the second box body 22.

[0104] According to some embodiments of the present application, optionally, the cold plate 40 is connected and fixed with the first plate body 213 and the second plate body, respectively.

[0105] This can further improve the connection strength between the first plate body 213 and the second plate body, and can reduce the risk of the first plate body 213 and the second plate body being pushed apart by the expansion force when the first plate body 213 and the second plate body bear the expansion force of the cells 10 in the cell column 31.

[0106] For example, in combination with Figure 5 and Figure 6It can be understood that the cold plate 40 has a first end portion 41 at one end of the second plate body or the first plate body 213, and the second plate body or the first plate body 213 is provided with a plurality of first through holes 221 corresponding to the position of the first end portion 41, the plurality of first through holes 221 are arranged at intervals, and a fastener 70 is arranged in each first through hole 221, and the fastener 70 in the first through hole 221 connects and fixes the second plate body or the first plate body 213 and the first end portion 41.

[0107] Since the cold plate 40 is arranged between different cell columns 31, by connecting the first end portion 41 of the cold plate 40 arranged towards the second plate body or the first plate body 213 with the second plate body or the first plate body 213, the connection position of the cold plate 40 and the second plate body or the first plate body 213 is close to the cell columns 31 on both sides of the cold plate 40, so that the expansion force of the cell columns 31 on both sides of the cold plate 40 is closer to the connection position of the cold plate 40 and the second plate body or the first plate body 213, and the limiting effect of the expansion force of the cell columns 31 on both sides of the cold plate 40 is better.

[0108] Optionally, as shown in Figure 5 , the fastener 70 for connecting and fixing the second box body 22 and the first end portion 41 can be a countersunk screw, and correspondingly, the first through hole 221 can be a stepped hole as shown in Figure 5 . Alternatively, in other embodiments, the fastener 70 for connecting and fixing the second box body 22 and the first end portion 41 can be a flat head screw, and correspondingly, the first through hole 221 can be a cylindrical through hole. Of course, the fastener 70 for connecting and fixing the second box body 22 and the first end portion 41 can also be a bolt.

[0109] According to some embodiments of the present application, optionally, one end of the cell 10 has a pole 13, and among the cell columns 31 on the opposite sides of the cold plate 40, each cell 10 has the end with the pole 13 arranged away from the cold plate 40, and the end away from the pole 13 of each cell 10 is arranged towards the cold plate 40 and thermally conducts with the cold plate 40.

[0110] Arranging the end of the cell 10 with the pole 13 away from the cold plate 40, and arranging the end of the cell 10 away from the pole 13 towards the cold plate 40 and thermally conducting with the cold plate 40, while meeting the thermal conduction of the cell 10 and the cold plate 40, can make the pole 13 of the cell 10 avoid the cold plate 40 and other cell columns 31, so as to facilitate the more compact arrangement of the cells 10 in the battery box 20, thereby further improving the density of the cells 10 in the battery box 20 and improving the energy storage density.

[0111] According to some embodiments of the present application, optionally, the plurality of cell columns 31 are distributed on opposite sides of the cold plate 40, and the plurality of cell columns 31 on the same side of the cold plate 40 are arranged along a second direction to form a cell column matrix 32, the second direction being parallel to the cold plate 40 and perpendicular to the first direction, and each cell column 31 of the cell column matrix 32 is in thermal conduction with the cold plate 40.

[0112] The second direction, for example Figure 5 As shown in FIG. 2, the plurality of cell columns 31 are arranged along the S2 direction to form the cell column matrix 32.

[0113] By distributing the plurality of cell columns 31 on each of the opposite sides of the cold plate 40, and arranging the plurality of cell columns 31 on the same side of the cold plate 40 along the second direction to form the cell column matrix 32, the plurality of cell columns 31 are regularly arranged in the second direction and the direction perpendicular to the cold plate 40, so that more cell 10 can be accommodated in the battery box 20, and the distribution density of the cell 10 in the battery box 20 is improved, thereby improving the energy storage density of the battery device.

[0114] For example, taking the cuboid-shaped battery box 20 as an example, the first direction can be the height direction of the cuboid, the second direction can be the length direction of the cuboid, and the width direction of the cuboid can be understood as the direction perpendicular to the first direction and the second direction, or the thickness direction of the cold plate 40.

[0115] The cold plate 40 is arranged in the battery box 20 to divide the space in the battery box 20 into two chambers arranged along the width direction, and the cell columns 31 are arranged on opposite sides of the cold plate 40, so that the cell 10 can fully occupy the space in the battery box 20 along the width direction, the plurality of cell columns 31 on the same side of the cold plate 40 are arranged along the second direction to form the cell column matrix 32, so that the cell 10 can fully occupy the space in the battery box 20 along the length direction, and the cell 10 in each cell column 31 is arranged along the first direction, so that the cell 10 can fully occupy the space in the battery box 20 along the height direction. In this way, the cell 10 fully occupies the space in the battery box 20, and the density of the cell 10 in the battery box 20 is improved, thereby improving the energy storage density of the battery device 100.

[0116] According to some embodiments of the present application, optionally, the battery device further comprises an end plate 60, and the end plate 60 is arranged in the accommodation space, and the end plate 60 is arranged at both ends of the cell column matrix 32 along the second direction.

[0117] The two end plates 60 are connected with the cell column matrix 32 at both ends along the second direction in a one-to-one correspondence. By connecting the end plate 60 with the cell column matrix 32 at the end position along the second direction, the connection strength of the cell 10 in the cell column matrix 32 can be further improved. Meanwhile, the end plate 60 can be used for fixing the connection of the output pole tab and the copper bar, and the like, thereby providing more possibilities for the structural arrangement of the product.

[0118] According to some embodiments of the present application, optionally, a first structural adhesive layer is arranged between adjacent cell columns 31 arranged along the second direction.

[0119] The first structural adhesive layer can be used to connect the adjacent cell columns 31 along the second direction into a whole, thereby reducing the relative shaking between the cells 10 and improving the structural strength.

[0120] Optionally, the first structural adhesive layer can be a double-sided adhesive or a structural layer formed by solidification of glue, and the like.

[0121] According to some embodiments of the present application, optionally, a second structural adhesive layer is arranged between adjacent cells 10 arranged along the first direction in the same cell column 31.

[0122] The second structural adhesive layer can be used to connect the cells 10 in the cell column 31 into a whole, thereby reducing the relative shaking between the cells 10 and improving the structural strength.

[0123] Optionally, the second structural adhesive layer can be a double-sided adhesive or a structural layer formed by solidification of glue, and the like.

[0124] According to some embodiments of the present application, optionally, a third structural adhesive layer is arranged between the surface of the cell column 31 facing the first plate body 213 and the first plate body 213, and / or a fourth structural adhesive layer is arranged between the surface of the cell column 31 facing the second plate body and the second plate body.

[0125] The third structural adhesive layer arranged between the surface of the cell column 31 facing the first plate body 213 and the first plate body 213, and / or the fourth structural adhesive layer arranged between the surface of the cell column 31 facing the second plate body and the second plate body, can be used to connect the battery box 20 and each cell column 31 in the battery box 20 into a whole through the third structural adhesive layer and the fourth structural adhesive layer, thereby improving the consistency of the main frequency of the battery device.

[0126] Optionally, the third structural adhesive layer and / or the fourth structural adhesive layer can be a double-sided adhesive or a structural layer formed by solidification of glue, and the like.

[0127] According to some embodiments of the present application, as shown in FIG. 1, the battery device 1 comprises a battery box 20 and a plurality of cells 10 arranged in the battery box 20. Figure 8As shown, optionally, two or more cell columns 31 are distributed on the same side of the cold plate 40; the battery device further comprises a support beam 50, the support beam 50 is located in the accommodation space, and the support beam 50 is arranged between at least one adjacent cell column 31 on the same side of the cold plate 40, one end of the support beam 50 along the first direction is arranged towards the first plate body 213 and is connected and fixed with the first plate body 213, and the other end of the support beam 50 along the first direction is arranged towards the second plate body and is connected and fixed with the second plate body.

[0128] By connecting and fixing the support beam 50 with the first plate body 213 and the second plate body respectively, the connection strength between the first box body 21 and the second box body 22 can be improved, and when the second plate body and the first plate body 213 bear the expansion force of the cell 10 in the cell column 31, the risk of the second plate body and the first plate body 213 being pushed open by the expansion force can be reduced.

[0129] By arranging the support beam 50 at a position between at least one adjacent cell column 31 on the same side of the cold plate 40, in combination with the structure that the support beam 50 is connected and fixed with the first plate body 213 and the second plate body respectively, the fulcrum span between the first plate body 213 and the second plate body can be reduced, thereby reducing the deformation amount of the first plate body 213 and the second plate body when they bear the expansion force of the cell 10, and reducing the damage risk of the first plate body 213 and the second plate body.

[0130] According to some embodiments of the present application, as Figure 10 As shown, optionally, the support beam 50 comprises a first wing plate 51, a second wing plate 52 and a web plate 53. The second wing plate 52 is arranged in opposite spaced relation to the first wing plate 51. The web plate 53 is located between the first wing plate 51 and the second wing plate 52 and is connected with the first wing plate 51 and the second wing plate 52 respectively, the web plate 53 separates at least one adjacent cell column 31 on the same side of the cold plate 40, the first wing plate 51 is arranged towards the first plate body 213 and is connected and fixed with the first plate body 213, and the second wing plate 52 is arranged towards the second plate body and is connected and fixed with the second plate body.

[0131] By arranging the support beam 50 to comprise the first wing plate 51, the second wing plate 52 and the web plate 53 between the first wing plate 51 and the second wing plate 52, the support beam 50 is substantially in the shape of an I-beam, the strength of the support beam 50 itself is higher, and the connection strengthening effect of the support beam 50 on the first plate body 213 and the second plate body can be further improved, thereby further improving the restriction effect of the first plate body 213 and the second plate body on the expansion force.

[0132] According to some embodiments of the present application, optionally, the first plate body 213 has a first recess 214 on the surface facing the accommodation space, the first recess 214 is arranged in position corresponding to the first wing plate 51 and accommodates the first wing plate 51; the second plate body has a second recess 223 on the surface facing the accommodation space, the second recess 223 is arranged in position corresponding to the second wing plate 52 and accommodates the second wing plate 52.

[0133] The first recess 214 is arranged on the first plate body 213 to accommodate the first wing plate 51, so that the first wing plate 51 does not additionally occupy the height dimension of the battery box 20, the occupation of the support beam 50 to the accommodation space can be reduced, the energy storage density is improved, at the same time, the thickness of the first wing plate 51 is also avoided to be limited by the height dimension of the battery box 20, so that the first wing plate 51 can be made thicker to meet the strength requirement of the support beam 50.

[0134] The second recess 223 is arranged on the second plate body to accommodate the second wing plate 52, so that the second wing plate 52 does not additionally occupy the height dimension of the battery box 20, the occupation of the support beam 50 to the accommodation space can be reduced, the energy storage density is improved, at the same time, the thickness of the second wing plate 52 is also avoided to be limited by the height dimension of the battery box 20, so that the second wing plate 52 can be made thicker to meet the strength requirement of the support beam 50.

[0135] According to some embodiments of the present application, as shown in Figure 10 Optionally, the surface of the first plate body 213 facing away from the accommodation space has a plurality of second through holes 228, the plurality of second through holes 228 penetrate to the inner bottom surface of the first recess 214, the plurality of second through holes 228 are in communication with the first recess 214, a fastener 70 is arranged in the second through hole 228, and the fastener 70 in the second through hole 228 connects and fixes the first plate body 213 and the first wing plate 51 in the first recess 214. And / or, in combination with Figure 8 、 Figure 9 and Figure 10 It can be understood that the surface of the second plate body facing away from the accommodation space has a plurality of third through holes 229, the plurality of third through holes 229 penetrate to the inner bottom surface of the second recess 223, the plurality of third through holes 229 are in communication with the second recess 223, a fastener 70 is arranged in the third through hole 229, and the fastener 70 in the third through hole 229 connects and fixes the second plate body and the second wing plate 52 in the second recess 223.

[0136] In this way, both the occupation of the first wing plate 51 and / or the second wing plate 52 to the height space in the battery box 20 is reduced, and the connection and fastening between the first plate body 213 and the first wing plate 51 and / or the connection and fastening between the second plate body and the second wing plate 52 are realized.

[0137] Optionally, the fastener 70 for connecting and fixing the first plate body 213 with the first wing plate 51 in the first groove 214, and / or the fastener 70 for connecting and fixing the second plate body with the second wing plate 52 in the second groove 223 can be a flat head screw, and correspondingly, the second through hole 228 and / or the third through hole 229 can be a cylindrical through hole. Of course, the fastener 70 for connecting and fixing the first plate body 213 with the first wing plate 51 in the first groove 214, and / or the fastener 70 for connecting and fixing the second plate body with the second wing plate 52 in the second groove 223 can also be a bolt or the like. Alternatively, in other embodiments, the fastener 70 for connecting and fixing the first plate body 213 with the first wing plate 51 in the first groove 214, and / or the fastener 70 for connecting and fixing the second plate body with the second wing plate 52 in the second groove 223 can be a countersunk screw, and correspondingly, the second through hole 228 and / or the third through hole 229 can be a stepped hole.

[0138] According to some embodiments of the present application, as shown in Figure 8 Optionally, the cold plate 40 is provided with support beams 50 on opposite sides, and the support beams 50 on the opposite sides of the cold plate 40 are correspondingly arranged.

[0139] The support beams 50 are arranged on the opposite sides of the cold plate 40, so that the positions of the first plate body 213 and the second plate body on the opposite sides of the cold plate 40 are further connected by the support beams 50, thereby further improving the structural strength of the battery box 20, so that the first plate body 213 and the second plate body can more reliably bear the expansion force.

[0140] And by correspondingly arranging the positions of the support beams 50 on the opposite sides of the cold plate 40, the stress distribution on the first plate body 213 and the second plate body can be more uniform, thereby improving the limiting effect of the first plate body 213 and the second plate body on the expansion force.

[0141] According to some embodiments of the present application, as shown in Figure 5 and Figure 8 Optionally, the first box body 21 can include a first plate body 213 and a frame 215, the first plate body 213 is connected with the frame 215, the first plate body 213 shields an opening at one end of the frame 215, and the other end of the frame 215 has a second end portion 211 and an opening 212 surrounded by the second end portion 211. Generally, the first plate body 213 can also be referred to as a bottom plate.

[0142] The second plate body itself serves as the second box body 22. Therefore, the second plate body in the embodiment can be understood by referring to the structure corresponding to the same reference number in the same drawing. Generally, the second plate body can also be referred to as a cover body. The second plate body covers the second end portion 211 and the opening 212 surrounded by the second end portion 211. The second plate body is provided with a plurality of fourth through holes 222 at a position corresponding to the second end portion 211. The plurality of fourth through holes 222 are arranged at intervals. A fastener 70 is arranged in each fourth through hole 222. The fastener 70 in the fourth through hole 222 connects and fixes the second plate body and the second end portion 211.

[0143] The second end portion 211 of the frame 215 is connected to the second plate body. Thus, the connection position of the second end portion 211 of the frame 215 and the second plate body is located at the edge of the second plate body. In combination with the structure that the cold plate 40 is connected to the first plate body 213 and the second plate body and the structure that the support beam 50 is connected to the first plate body 213 and the second plate body, the cold plate 40 and the support beam 50 are connected to the first plate body 213 and the second plate body. Thus, the fulcrum span of the connection position of the edge of the second plate body and the frame 215 is reduced. Thus, the deformation amount of the second plate body and the first plate body 213 when they bear the expansion force can be reduced, and the risk of damage to the cover body can be reduced.

[0144] Of course, the embodiments of the present application are not limited thereto. In other embodiments, the second box body 22 can include the frame and the second plate body.

[0145] Optionally, as shown in Figure 5 , the fastener 70 for connecting and fixing the second plate body and the second end portion 211 can be a countersunk screw. Correspondingly, the fourth through hole 222 can be a stepped hole as shown in Figure 5 . Alternatively, in other embodiments, the fastener 70 for connecting and fixing the second box body 22 and the second end portion 211 can be a flat head screw. Correspondingly, the fourth through hole 222 can be a cylindrical through hole. Of course, the fastener 70 for connecting and fixing the second plate body and the second end portion 211 can also be a bolt.

[0146] According to some embodiments of the present application, the second plate body (the second plate body can be understood as the second box body 22 in the drawings of the embodiment) is a profiled plate.

[0147] It can be understood that a profiled material is a material with a certain cross-sectional shape and size, which is usually made of metal (such as steel, aluminum alloy) or composite material (such as basalt fiber reinforced composite material) through plastic processing processes such as rolling, extrusion, and casting. The cross-sectional shape of the profiled material is various, including circular, square, I-shaped, H-shaped, etc. The profiled material is generally constructed with a cavity. The cavity makes the cross section of the profiled material present a certain pattern, which can improve the structural strength of the profiled material while taking into account the lightness of the profiled material.

[0148] Profiled panels refer to structural panels made of profiles.

[0149] Setting the second plate as a profile plate can improve its structural strength, allowing it to more reliably withstand expansion forces and enhance product reliability.

[0150] Of course, the embodiments of this application are not limited thereto. In other embodiments, the first plate 213 may be a profile plate, or both the first plate 213 and the second plate may be profile plates.

[0151] Combination Figure 7 and Figure 11 It is understood that, according to some embodiments of this application, optionally, the profile plate has a plurality of cavities 224 and a plurality of solid parts 225 formed inside, and the plurality of cavities 224 and the plurality of solid parts 225 are alternately arranged in a direction perpendicular to the first direction, and the through holes on the profile plate for fasteners 70 are all provided on the solid parts 225.

[0152] By setting all the through holes (such as the first through hole 221 and / or the second through hole 228 and / or the third through hole 229 and / or the fourth through hole 222) on the profile plate for fasteners 70, the structural strength of the profile plate at the connection point based on the fasteners 70 can be improved, and the risk of connection failure between the first housing 21 and the second housing 22 can be reduced.

[0153] According to some embodiments of this application, the second plate may optionally be a die-cast plate.

[0154] Die-cast plates are metal sheets made through high-pressure casting. They are usually made of materials such as aluminum alloys and zinc alloys, and are formed by filling a mold cavity under high pressure and then rapidly cooling.

[0155] By making the second plate a die-cast plate, the structural strength of the second plate can be improved. In this way, the second plate can more reliably bear the expansion force and improve the reliability of the product.

[0156] Of course, the embodiments of this application are not limited thereto. In other embodiments, the first plate 213 may be a die-cast plate, or both the first plate 213 and the second plate may be die-cast plates.

[0157] like Figure 12 As shown, according to some embodiments of this application, optionally, one side surface of the die-cast plate has a plurality of first ribs 226 and a plurality of second ribs 227. The first ribs 226 form a closed or open annular column. The through holes on the die-cast plate for fasteners 70 are correspondingly provided to the annular column. The plurality of second ribs 227 are arranged alternately and connected to the first ribs 226.

[0158] The annular column formed by the first ribs 226 and the cavity formed by the second ribs 227 arranged in a staggered manner can produce an effect similar to a cavity, so as to increase the structural rigidity of the die-casting plate by increasing the volume of the die-casting plate without excessively increasing the weight of the die-casting plate, thereby improving the strength reliability of the first plate body 213 and / or the second plate body. By connecting the second ribs 227 with the first ribs 226 to strengthen the closed or unclosed annular column surrounded by the first ribs 226, the structural strength at the position where the die-casting plate is connected based on the fastener 70 can be improved, and the risk of connection failure between the first box body 21 and the second box body 22 can be reduced.

[0159] In one specific embodiment of the present application, as shown in Figures 5 to 7 The battery cell 10 is stacked in a lying manner along the height direction of the battery box 20, and the bottom of the battery cell 10 (the end of the battery cell 10 away from the electrode assembly 12) is stacked in the width direction of the battery box 20, and the side of the battery cell 10 is stacked in the length direction of the battery box 20. Any two adjacent battery cells 10 are bonded by double-sided adhesive. A water-cooled plate (i.e., a cooling plate 40) is arranged between the bottoms of the two battery cells 10 arranged at the bottom of the battery cell 10. One water-cooled plate can cool both left and right battery cells 10. The water-cooled plate and the battery cell 10 are bonded by a heat-conducting structural adhesive to ensure structural strength while taking into account the heat transfer efficiency between the battery cell 10 and the water-cooled plate. Alternatively, the heat-conducting structure can be a heat-conducting gel or the like.

[0160] Based on the structure of the lying battery cell 10, in order to enable the first box body 21 and the second box body 22 to have sufficient structural strength to withstand the expansion force of the battery cell 10, the second box body 22 and the first box body 21 themselves need to have a certain structural strength. For example, the second box body 22 can be a profile material, and / or the first plate body 213 of the first box body 21 can be a profile material, etc.

[0161] The water-cooled plate is connected and fixed to the bottom of the second box body 22 and the first box body 21 by bolts, and the structural strength of the bottom of the second box body 22 and the first box body 21 is further increased by the fixing point design of the water-cooled plate. End plates 60 are designed at the front and back of the entire battery cell 10 arrangement module, and the adhesion of the end plates 60 and the battery cell 10 further fixes the battery cell 10 to ensure the structural strength of the battery cell 10 after grouping. At the same time, the end plate 60 can be used to bear the connection and fixing structure of the output pole tab and the copper bar.

[0162] The embodiment lays the battery cell 10 flat, and stacks the battery cell 10 in the height direction by itself. The battery cell 10 is fixed by the high-strength second box body 22 and the bottom structure of the first box body 21, and by the adhesive fixing of the wall 15 with the largest area of the battery cell 10 to the second box body 22 and the bottom of the first box body 21, so as to make full use of the space in the battery box 20 and improve the distribution density of the battery cell 10, thereby improving the energy storage density of the battery device 100.

[0163] The battery cell 10 arranged bottom-to-bottom is separated by the water-cooled plate, so that all the battery cells 10 can be cooled by the same water-cooled plate, without the need to design a water-cooled plate for each layer of battery cells 10, thereby further simplifying the structure of the battery device 100 and reducing the cost.

[0164] In one specific embodiment of the present application, as shown in Figure 8 and Figure 10 A support beam 50 is connected between the second box body 22 and the first plate body 213, and the support beam 50 is located between the battery cells 10. The support beam 50 and the first plate body 213 of the second box body 22 and the first box body 21 are fixed by bolts, thereby enhancing the structural strength of the second box body 22 and the first plate body 213 of the first box body 21. In this way, when the expansion force of the battery cell 10 is large, or when the length of the battery cell 10 is arranged in the length direction and the fixed bolt span of the bottom of the second box body 22 and the first box body 21 is increased, the structural strength of the second box body 22 and the first box body 21 is enhanced, while the fixed point span on the second box body 22 and the fixed point span on the bottom of the first box body 21 are reduced, so that the structural strength of the second box body 22 and the first box body 21 can better meet the expansion force requirement of the battery cell 10.

[0165] As shown in Figure 10 The support beam 50 is arranged in an I-shaped form to enhance the structural strength of the support beam 50 without increasing the thickness of the support beam 50. The second box body 22 is provided with a first recess 214, and the first plate body 213 of the first box body 21 is provided with a second recess 223. One end of the support beam 50 is accommodated in the first recess 214, and the other end of the support beam 50 is accommodated in the second recess 223, thereby reducing the occupation of the internal space of the battery box 20 by the support beam 50. The support beam 50 can be fixed to the second box body 22 by flat head bolts or countersunk head bolts. Such a structure can not only meet the structural strength requirement of the first box body 21, but also reduce the occupation of the arrangement space of the battery cell 10 in the battery box 20 by the support beam 50, thereby improving the battery capacity of the battery device 100 and improving the market competitiveness of the product.

[0166] The embodiment of the second aspect of the present application provides a power storage device, comprising the battery device 100 in any embodiment of the first aspect.

[0167] Since the power storage device comprises the battery device 100, the battery device 100 can improve the distribution density of the battery cell 10 in the battery box 20, so that the battery device 100 can achieve higher energy storage density, and therefore, the power storage device can have higher energy storage density.

[0168] The embodiment of the third aspect of the present application provides a power consumption device, comprising the battery device 100 in any embodiment of the first aspect.

[0169] Since the power consumption device comprises the battery device 100, the battery device 100 can improve the distribution density of the battery cell 10 in the battery box 20, so that the battery device 100 can achieve higher energy storage density, and therefore, the power consumption device can have higher energy storage density.

[0170] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0171] Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A battery device, characterized in that, include: A battery box includes a first box and a second box. The first box and the second box are connected and enclose a receiving space. The first box includes a first plate, and the second box includes a second plate. The first plate and the second plate are arranged at a distance from each other along a first direction. The receiving space is located between the first plate and the second plate. Multiple battery cells are located within the accommodating space, with at least two of the battery cells arranged along the first direction to form a battery cell column. The adjacent battery cells within the same battery cell column have the largest area walls correspondingly arranged. One end of the battery cell column along the first direction faces the first plate, and the other end of the battery cell column along the first direction faces the second plate. A cold plate is located within the accommodating space. The cold plate is arranged parallel to the first direction. The battery cell arrays are distributed on both sides of the cold plate. The cold plate and the battery cell arrays on both sides of the cold plate are thermally connected. The cold plate is connected and fixed to the first plate and the second plate respectively.

2. The battery device according to claim 1, characterized in that, The cold plate has a first end facing the second plate or the first plate. The second plate or the first plate is provided with a plurality of first through holes at the position corresponding to the first end. The plurality of first through holes are spaced apart. A fastener is inserted into each of the first through holes. The fastener in the first through holes connects and fixes the second plate or the first plate to the first end.

3. The battery device according to claim 1 or 2, characterized in that, One end of the battery cell has a terminal post. In the battery cell rows on opposite sides of the cold plate, the end of each battery cell with the terminal post faces away from the cold plate, and the end of each battery cell away from the terminal post faces the cold plate and is thermally connected with the cold plate.

4. The battery device according to claim 3, characterized in that, Multiple battery cell columns are distributed on both sides of the cold plate. Multiple battery cell columns on the same side of the cold plate are arranged along a second direction to form a battery cell column matrix. The second direction is parallel to the cold plate and perpendicular to the first direction. Each battery cell column in the battery cell column matrix is ​​thermally connected to the cold plate.

5. The battery device according to claim 4, characterized in that, Also includes: End plates are located within the accommodating space, and the end plates are provided at both ends of the cell array along the second direction.

6. The battery device according to claim 4, characterized in that, A first structural adhesive layer is provided between adjacent rows of cells arranged along the second direction.

7. The battery device according to claim 1 or 2, characterized in that, Within the same cell array, a second structural adhesive layer is provided between adjacent cells along the first direction.

8. The battery device according to claim 1 or 2, characterized in that, A third structural adhesive layer is disposed between the surface of the battery cell array facing the first plate and the first plate; and / or A fourth structural adhesive layer is provided between the surface of the battery cell array facing the second plate and the second plate.

9. The battery device according to claim 1 or 2, characterized in that, Two or more rows of the battery cells are distributed on the same side of the cold plate; The battery device further includes a support beam located within the accommodating space. The support beam is disposed between at least one adjacent cell row on the same side of the cold plate. One end of the support beam along the first direction is disposed toward the first plate and is connected and fixed to the first plate. The other end of the support beam along the first direction is disposed toward the second plate and is connected and fixed to the second plate.

10. The battery device according to claim 9, characterized in that, The supporting beam includes: First wing plate; The second wing plate is disposed at a distance from the first wing plate; A web plate is located between the first wing plate and the second wing plate, and is connected to the first wing plate and the second wing plate respectively. The web plate separates at least one adjacent cell row on the same side of the cold plate. The first wing plate is disposed towards the first plate body and is fixedly connected to the first plate body. The second wing plate is disposed towards the second plate body and is fixedly connected to the second plate body.

11. The battery device according to claim 10, characterized in that, The first plate has a first groove on its surface facing the receiving space. The first groove is positioned corresponding to the first wing plate and accommodates the first wing plate. The second plate has a second groove on its surface facing the receiving space. The second groove is positioned corresponding to the second wing plate and receives the second wing plate.

12. The battery device according to claim 11, characterized in that, The first plate has a plurality of second through holes on its surface facing away from the receiving space. These second through holes extend to the inner bottom surface of the first groove and communicate with it. Fasteners are inserted into the second through holes to connect and fix the first plate to the first wing plate within the first groove; and / or The second plate has a plurality of third through holes on its surface facing away from the receiving space. The plurality of third through holes penetrate to the inner bottom surface of the second groove and communicate with the second groove. Fasteners are inserted in the third through holes and the fasteners in the third through holes connect and fix the second plate to the second wing plate in the second groove.

13. The battery device according to claim 9, characterized in that, The support beams are distributed on both sides of the cold plate, and the positions of the support beams on both sides of the cold plate are correspondingly arranged.

14. The battery device according to claim 1 or 2, characterized in that, One or both of the first plate and the second plate are profile plates.

15. The battery device according to claim 14, characterized in that, The profile plate has multiple cavities and multiple solid parts inside. The multiple cavities and multiple solid parts are arranged alternately in a direction perpendicular to the first direction. The through holes on the profile plate for fasteners are all provided on the solid parts.

16. The battery device according to claim 1 or 2, characterized in that, One or both of the first plate and the second plate are die-cast plates.

17. The battery device according to claim 16, characterized in that, The die-cast plate has a plurality of first ribs and a plurality of second ribs on one side surface. The first ribs form a closed or open annular column. The through holes on the die-cast plate for fasteners are corresponding to the annular column. The plurality of second ribs are arranged alternately and connected to the first ribs.

18. An energy storage device, characterized in that, Includes the battery device as described in any one of claims 1 to 17.

19. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1 to 17.

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