Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device and a power utilization device. The battery device comprises a battery box, the battery box comprises a lower box body, and a containing cavity is defined by the lower box body; the lower box body is a non-metal piece, the lower box body is provided with a first panel, the first panel is the panel with the largest area in the lower box body, the first panel is provided with a first boss, the boss partially protrudes from the first panel to the direction where the battery monomers are located, and a concave cavity is formed in the side, away from the battery monomers, of the first boss. According to the technical scheme, the weight of the battery box can be reduced, the production process of the battery box is simplified, and the production cost is reduced.

Description

Technical Field

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

[0002] This section merely provides background information related to the present disclosure and is not necessarily prior art.

[0003] At present, battery devices are widely used in various consumer electronic products and electric vehicles due to their outstanding characteristics such as light weight, no pollution, and no memory effect.

[0004] Among them, the battery device usually includes a battery box, and the lower box body of the battery box is generally made of metal, which leads to a larger overall weight of the battery box, more steps in the manufacturing process, more complicated process and higher production cost. Utility Model Content

[0005] The purpose of the present application is to provide a battery device and an electrical device to reduce the weight of the battery box and reduce the production cost. This purpose is achieved through the following technical solutions:

[0006] In a first aspect, the present application provides a battery device, comprising: a battery box, the battery box comprising a lower box body, the lower box body defining a accommodating cavity; a battery cell accommodated in the accommodating cavity, wherein the lower box body is a non-metallic part, the lower box body has a first panel, the first panel is the panel with the largest area in the lower box body, the first panel is provided with a plurality of first bosses, the first bosses partially protrude from the first panel toward the direction of the battery cell, and a concave cavity is formed on the side of the first boss away from the battery cell.

[0007] According to the battery device provided in the present application, by setting the lower box body as a non-metallic part, such as a plastic part, a rubber part or a plastic part, the lower box body is lighter in weight than a metal material, which helps to meet the lightweight design requirements of the product. In addition, by setting a first boss on the first panel of the lower box body, the first boss protrudes from the first panel toward the direction where the battery cell is located, so that the first boss can play a role in supporting the battery cell. The first boss has good support, which helps to improve the overall rigidity of the lower box body, and the first boss can also be partially deformed when bearing weight to play a buffering role, thereby reducing the risk of overall deformation of the lower box body due to heavy load-bearing. At the same time, since the lower box body is a non-metallic part, it does not need to perform production steps such as welding, electrophoresis, and spraying of an insulating layer compared to a lower box body made of metal, which helps to simplify the processing technology of the product and reduce the production cost of the product.

[0008] In addition, the battery device provided in this application may also have the following additional technical features:

[0009] In some embodiments of the present application, there are multiple first bosses, and the multiple first bosses are divided into multiple groups. The multiple groups of first bosses are spaced apart along the first direction of the lower box body, and each group of first bosses includes multiple first bosses spaced apart along the second direction of the lower box body, and the second direction intersects with the first direction.

[0010] In the above technical solution, multiple first bosses are divided into multiple groups and arranged at intervals, and each group is provided with multiple first bosses, so that the weight borne by the lower box can be distributed more evenly, which helps to further reduce the risk of overall deformation of the lower box due to heavy load.

[0011] In some embodiments of the present application, the projection area of ​​the plurality of first bosses on the first panel accounts for less than 50% of the overall projection area of ​​the first panel.

[0012] In the above technical solution, by adopting the above setting method, the projection area of ​​the multiple first bosses occupies a relatively small area of ​​the overall area of ​​the first panel, so that the first panel is flat as a whole, which helps to improve the production efficiency of the lower box.

[0013] In some embodiments of the present application, the battery box also includes a heat exchange plate, which is arranged between the battery cell and the first panel and is adhesively connected to the surface of the first boss facing the heat exchange plate, and the heat exchange plate is used for heat exchange with the battery cell.

[0014] In the above technical solution, the first boss is bonded to the heat exchange plate with one side surface facing the heat exchange plate to form an integrated structure. In this way, when the battery cell is accommodated in the accommodating cavity and the battery cell is in contact and connected with the large surface of the heat exchange plate, the heat exchange plate and the lower box can bear the weight of the battery cell at the same time, thereby improving the overall supporting performance of the lower box, thereby further improving the bearing capacity of the lower box and further reducing the risk of deformation of the lower box due to heavy load.

[0015] In some embodiments of the present application, the heat exchange plate includes a first plate and a second plate, the first plate is connected to the battery cell, the first plate is a flat plate and is located between the second plate and the lower box, the second plate is provided with a flow channel area and a connection area, in the flow channel area, the first plate and the second plate are spaced apart to form a fluid channel, in the connection area, the first plate and the second plate are tightly connected; the connection area is connected to the first boss.

[0016] In the above technical solution, the fluid channel between the first plate and the second plate of the heat exchange plate is used to circulate the heat exchange medium, and the heat exchange medium can circulate in the fluid channel, so as to exchange heat for the battery cell. Among them, the first plate is a flat plate and is supported on the bottom of the battery cell. The first plate and the second plate are tightly connected through the connection area to seal the fluid channel, and the connection area of ​​the second plate is connected to the first boss, so that the first boss can transfer the supporting force to the battery cell through the second plate and the first plate in sequence, which is not only convenient for stabilizing the support of the battery cell, but also helps to increase the contact area with the battery cell because the first plate is a flat plate, thereby improving the heat exchange efficiency of multiple battery cells.

[0017] In some embodiments of the present application, there are multiple connection areas, the multiple connection areas are arranged at intervals, and the flow channel area is arranged between adjacent connection areas.

[0018] In the above technical solution, multiple connection areas are arranged corresponding to multiple groups of first bosses, each group of first bosses is connected to a connection area, and the flow channel area between adjacent connection areas does not correspond to the first protrusion, which helps to improve the uniformity of support for multiple battery cells and reduce the risk of collapse and blockage of the flow channel area due to stress concentration when subjected to force.

[0019] In some embodiments of the present application, a groove is formed in the connection area, and the first boss extends into the groove to be connected to the connection area.

[0020] In the above technical solution, the connection area is recessed relative to the flow channel area in a direction away from the first boss to form a groove, and the first boss extends into the groove and connects with the connection area, which not only helps to improve the connection reliability, but also helps to reduce the gap between the heat exchange plate and the first panel, thereby facilitating the connection between the heat exchange plate and the first panel.

[0021] In some embodiments of the present application, the area of ​​the flow channel region accounts for more than 50% of the overall area of ​​the heat exchange plate.

[0022] In the above technical solution, the above arrangement helps to increase the flow area of ​​the heat exchange medium in the flow channel area, thereby helping to improve the heat exchange efficiency of the battery cells.

[0023] In some embodiments of the present application, the battery box further includes a support assembly, at least a portion of which is disposed between the first panel and the heat exchange plate to support the heat exchange plate.

[0024] In the above technical solution, by arranging a support assembly in the lower box body, the support assembly is arranged between the first panel of the lower box body and the heat exchange plate, which can not only further improve the overall rigidity of the lower box body, but also play a supporting role for the heat exchange plate, and can maintain the distance and shape between the heat exchange plate and the first panel except for the first boss, so as to reduce the risk of deformation of the heat exchange plate when bearing a large load, further improve the bearing capacity of the lower box body, thereby further reducing the risk of deformation of the lower box body due to heavy load.

[0025] In some embodiments of the present application, the support assembly includes a plurality of transverse reinforcing ribs and a plurality of longitudinal reinforcing ribs, the plurality of transverse reinforcing ribs are spaced apart along a first direction of the lower box body, the plurality of longitudinal reinforcing ribs are spaced apart along a second direction of the lower box body and are all connected to the plurality of transverse reinforcing ribs, and the second direction is intersected with the first direction.

[0026] In the above technical solution, multiple transverse reinforcement ribs and multiple longitudinal beam reinforcement ribs are staggered and connected between the first panel and the heat exchange plate, so that the support effect on the heat exchange plate is more stable, and the force on the heat exchange plate is more uniform when bearing weight, thereby further improving the overall rigidity of the lower box and the stability when bearing weight.

[0027] In some embodiments of the present application, part of the transverse reinforcing ribs and / or part of the longitudinal reinforcing ribs are arranged to pass through the side wall surface of the concave cavity and abut against the bottom wall surface of the concave cavity.

[0028] In the above technical solution, part of the transverse reinforcing ribs arranged corresponding to the first boss penetrate the side wall of the concave cavity formed on the side of the first boss away from the heat exchange plate, or part of the longitudinal reinforcing ribs arranged corresponding to the first boss penetrate the side wall of the concave cavity formed on the side of the first boss away from the heat exchange plate, or part of the transverse reinforcing ribs arranged corresponding to the first boss and part of the longitudinal reinforcing ribs arranged corresponding to the first boss penetrate the side wall of the concave cavity at the same time, so that the transverse reinforcing ribs and the longitudinal reinforcing ribs are continuous reinforcing ribs without interruption in the middle, and the overall rigidity is better, so that the support assembly can bear the load of the heat exchange plate and the battery cell located above the heat exchange plate more stably.

[0029] In some embodiments of the present application, along the direction from the first panel to the heat exchange plate, a surface of the transverse reinforcing rib and / or the longitudinal reinforcing rib facing the heat exchange plate does not exceed a surface of the first boss facing the heat exchange plate.

[0030] In the above technical solution, since the first panel has a certain thickness, part of the transverse reinforcing ribs and / or part of the longitudinal reinforcing ribs penetrate the side wall of the concave cavity and abut against the side surface of the first boss facing away from the heat exchange plate. The side surface of the transverse reinforcing ribs and / or the longitudinal reinforcing ribs facing the heat exchange plate does not exceed the side surface of the first boss facing the heat exchange plate. In this way, the top surface of the first boss (the side surface facing the heat exchange plate) can maintain an adhesive connection with the heat exchange plate, and the first boss and the heat exchange plate can bear the weight of the battery cell at the same time.

[0031] In some embodiments of the present application, the support assembly and the lower box are integrally formed.

[0032] In the above technical solution, the support assembly and the lower box body can be formed by integral injection molding or hot pressing, which is not only convenient for processing and molding and suitable for mass production, but also helps to improve the overall rigidity of the lower box body, simplify the assembly and connection steps, and improve production efficiency.

[0033] In some embodiments of the present application, the lower box body also includes a plurality of side panels arranged around the first panel, each of the side panels is folded in a direction away from the accommodating cavity to form a flange, and a plurality of connecting holes are arranged at intervals on the flange, and the connecting holes are used to be fixedly connected to the upper box body of the battery box through a first fastener.

[0034] In the above technical solution, a plurality of side panels are arranged around the first panel, so as to enclose a receiving cavity for receiving the battery cell. Each side panel is folded away from the receiving cavity to form a flange, and a plurality of first connection holes are arranged at intervals on the flange, so as to facilitate the fixed connection between the lower box and the upper box by means of a first fastener (such as a rivet or a screw). The structure and principle are relatively simple and easy to implement.

[0035] In some embodiments of the present application, a plurality of spaced-apart limit grooves are defined on opposite sides of the lower box body, a connecting column is provided in the limit groove, the connecting column is defined with a threaded hole, the threaded hole passes through the connecting column along the axial direction of the connecting column, and is used to be fixedly connected to the upper box body of the battery box through a second fastener.

[0036] In the above technical solution, the lower box body is fixedly connected to the upper box body by a plurality of first fasteners passing through a plurality of connecting holes on the flange, and is also fixedly connected to the upper box body by a plurality of second fasteners (such as screws or bolts) passing through threaded holes on the connecting columns, thereby further improving the connection strength between the lower box body and the upper box body. The structure and principle are relatively simple and easy to implement.

[0037] In the second aspect, the present application provides a battery device, comprising: a battery box, the battery box comprising a lower box body and a heat exchange plate, the battery cell is installed on the side of the heat exchange plate away from the lower box body; wherein the lower box body is a non-metallic part, the lower box body has a first panel, the first panel is the panel with the largest area in the lower box body, the first panel is provided with a first boss, the first boss partially protrudes from the first panel toward the direction of the battery cell, and a concave cavity is formed on the side of the first boss away from the battery cell; the first panel is provided with a first surface and a second surface along the thickness direction, the first surface is a surface facing the battery cell, the first surface includes a first plane and a first reinforcing rib, the second surface includes a second plane and a second reinforcing rib; a first reinforcing rib is provided between the heat exchange plate and the second plane.

[0038] In the above technical solution, by setting a first boss on the first panel of the lower box, the overall rigidity of the lower box can be improved, the first boss is connected to the heat exchange plate, the battery cell is installed on the side of the heat exchange plate away from the first panel, the first boss can support the battery cell through the heat exchange plate, and by setting a first reinforcing rib on the first plane (the area except the first boss), the first reinforcing rib plays a role in further strengthening the rigidity of the lower box and improving the support stability of the heat exchange plate. In addition, by setting a second reinforcing rib on the second plane (the side of the first boss away from the heat exchange plate), the second reinforcing rib plays a role in supporting the first boss, thereby further improving the support stability of the first boss on the heat exchange plate and the battery cell.

[0039] In a third aspect, the present application provides an electrical device, comprising a battery device as described in any one of the embodiments of the first aspect or a battery device as described in any one of the embodiments of the second aspect, wherein the battery device is used to power the electrical device. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0041] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0042] Figure 2 A schematic diagram of the exploded structure of a battery device provided in some embodiments of the present application;

[0043] Figure 3 A schematic structural diagram of a lower box body from one perspective provided in some embodiments of the present application;

[0044] Figure 4 A schematic diagram of a partial structure of a lower box provided in some embodiments of the present application;

[0045] Figure 5 A schematic structural diagram of a lower box body from another perspective provided in some embodiments of the present application;

[0046] Figure 6 A structural schematic diagram of a lower box provided in some embodiments of the present application from another perspective;

[0047] Figure 7 for Figure 6 Schematic diagram of the cross-sectional structure along the AA direction;

[0048] Figure 8 A schematic diagram of the assembly structure of the heat exchange plate and the lower box from one perspective provided in some embodiments of the present application;

[0049] Fig. 9 A schematic diagram of the assembly structure of the heat exchange plate and the lower box from another perspective provided in some embodiments of the present application;

[0050] Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure along the BB direction;

[0051] Fig.11 for Fig.10 The enlarged structural diagram of the middle C part;

[0052] in, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 8 and Fig. 9 The direction of the X-axis of the mid-coordinate system represents the first direction, and the direction of the Y-axis represents the second direction.

[0053] The reference numerals are as follows:

[0054] 1000. Vehicles;

[0055] 100, battery device; 200, controller; 300, motor;

[0056] 10. Battery box; 11. Upper box body; 12. Lower box body; 13. Heat exchange plate; 20. Battery cell;

[0057] 121. First panel; 1211. First boss; 1212. Concave cavity; 122. Side panel; 123. Flange; 1231. Connecting hole; 1232. Limiting groove; 1233. Connecting column; 124. Support assembly; 1241. Transverse reinforcing rib; 1242. Longitudinal reinforcing rib; 131. First plate; 132. Second plate; 1321. Flow channel area; 1322. Connecting area; 133. Fluid channel. DETAILED DESCRIPTION

[0058] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0059] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0060] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0061] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0062] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0063] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0064] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0065] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0066] At present, from the perspective of market development, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of battery devices, the market demand is also constantly expanding.

[0067] Among them, the battery device usually includes a battery box, and the lower box body of the battery box is generally made of metal materials, such as steel, aluminum, etc., which makes the overall weight of the battery box larger, and the production process usually requires stamping or rolling, welding, electrophoresis, spraying of insulation layer and assembly. Due to the large number of production steps and the complicated production process, the production cost is higher.

[0068] In order to solve the problem that the overall weight is large and the production cost is high when the lower box of the battery box is made of metal, the present application designs a battery device, including a battery box and a battery cell, the battery box includes a lower box, and the battery cell is accommodated in the accommodating cavity of the lower box, wherein the lower box is a non-metallic part, and the lower box has a first panel, the battery cell is pressed on the first panel, the first panel is the panel with the largest area in the lower box, and the first panel is provided with a plurality of first bosses distributed in an array, and the plurality of first bosses protrude from the first panel toward the direction of the battery cell and are used to support the battery cell. In this way, when the battery cell is accommodated in the lower box, the first boss can preferentially bear the pressure of the battery cell, and can be partially deformed to play a buffering role, thereby reducing the risk of overall deformation of the lower box due to heavy load-bearing. In addition, since the lower box is a non-metallic part, the overall weight of the lower box is small, which is convenient for processing and molding, and helps to reduce the production cost of the product.

[0069] The battery device 100 disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. A power supply system of the electrical device can be composed of the battery device disclosed in the present application, which helps to reduce the weight of the battery device and reduce the production cost of the product.

[0070] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0071] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a vehicle provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0072] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0073] Please refer to Figure 2 , Figure 2Schematic diagram of the decomposed structure of the battery device provided in some embodiments of the present application. The battery device (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include a plurality of battery cells 20, and the plurality of battery cells 20 are connected in series, in parallel, or in mixed connection through a busbar component.

[0074] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 20 .

[0075] As an example, the battery cell assembly may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 20 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 20 by a cable tie.

[0076] In some embodiments, the battery device 100 may be a battery pack, which includes a battery box 10 and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the battery box 10 .

[0077] As an example, the battery cell assembly may be accommodated in the battery box 10 by fixing the battery module in the battery box 10 .

[0078] As an example, the battery cell assembly may also be accommodated in the battery box 10 by directly fixing the plurality of battery cells 20 to the battery box 10 .

[0079] The battery device 100 provided in the embodiment of the present application is suitable for various electrical devices, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc.

[0080] See also Figure 3 and Figure 4 , Figure 3 A schematic structural diagram of a lower box body from one perspective provided in some embodiments of the present application; Figure 4Schematic diagram of the partial structure of the lower box provided for some embodiments of the present application. The embodiment of the present application provides a battery device 100, including: a battery box 10 and a battery cell 20. Among them, the battery box 10 includes a lower box 12, and the lower box 12 defines a accommodating cavity; the battery cell 20 is accommodated in the accommodating cavity, the lower box 12 is a non-metallic part, and the lower box 12 has a first panel 121, and the first panel 121 is the panel with the largest area in the lower box 12. The first panel 121 is provided with a first boss 1211, and the first boss 1211 partially protrudes from the first panel 121 to the direction of the battery cell 20, and a concave cavity 1212 is formed on the side of the first boss 1211 away from the battery cell 20.

[0081] As an example, the battery box 10 may further include an upper box body 11, and the upper box body 11 and the lower box body 12 are buckled together, so that a closed space is formed inside the battery box 10 to accommodate the battery cells 20. The closed here means covered or closed, which can be sealed or unsealed. Exemplarily, the lower box body 12 can be a plastic part or a rubber part, and the upper box body 11 can also be a plastic part or a rubber part.

[0082] In some embodiments, the battery box 10 can be used as a part of the chassis structure of the vehicle. For example, a portion of the battery box 10 can become at least a part of the floor of the vehicle.

[0083] In the embodiment of the present application, the battery cell 20 may be a secondary battery. A secondary battery refers to a battery cell 20 that can be continuously used by activating active materials by charging after the battery cell 20 is discharged.

[0084] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead storage battery, etc., which is not limited in the embodiments of the present application.

[0085] Exemplarily, the cross section of the cavity 1212 is rectangular, and the number of sidewall surfaces is four.

[0086] According to the battery device provided by the present application, by setting the lower box 12 as a non-metallic part, such as a plastic part, a rubber part or a plastic part, the lower box 12 is lighter than a metal material, which helps to meet the lightweight design requirements of the product. In addition, by setting the first boss 1211 on the first panel 121 of the lower box 12, the first boss 1211 protrudes in the direction of the battery cell 20, so that the first boss 1211 can play a role in supporting the battery cell 20, which helps to improve the overall rigidity of the lower box 12, and the first boss 1211 can also be partially deformed when bearing weight to play a buffering role, thereby reducing the risk of overall deformation of the lower box 12 due to heavy load bearing. At the same time, since the lower box 12 is a non-metallic part, it does not need to perform production steps such as welding, electrophoresis and spraying of an insulating layer compared to the lower box 12 made of metal, which helps to simplify the processing technology of the product and reduce the production cost of the product.

[0087] See also Figure 3 and Figure 6 , Figure 6 A structural diagram of another perspective of the lower box provided for some embodiments of the present application. According to some embodiments of the present application, there are multiple first bosses 1211, and the multiple first bosses 1211 are arranged in multiple groups, and the multiple groups of first bosses 1211 are arranged at intervals along the first direction of the lower box 12, and each group of first bosses 1211 includes multiple first bosses 1211 arranged at intervals along the second direction of the lower box 12, and the second direction is arranged to intersect with the first direction.

[0088] Exemplarily, a plurality of first bosses 1211 are distributed in an array on the first panel 121 of the lower box body 12 .

[0089] For example, the first panel 121 is rectangular, the first direction may be the length direction of the lower box body 12, and the second direction may be the width direction of the lower box body 12.

[0090] The multiple first bosses 1211 are divided into multiple groups and arranged at intervals, and each group is provided with multiple first bosses 1211, so that the weight borne by the lower box 12 can be distributed more evenly, which helps to further reduce the risk of overall deformation of the lower box 12 due to the heavy load.

[0091] According to some embodiments of the present application, the projection area of ​​the plurality of first bosses 1211 on the first panel 121 accounts for less than 50% of the overall projection area of ​​the first panel 121 .

[0092] By adopting the above arrangement, the projection area of ​​the plurality of first bosses 1211 accounts for a relatively small proportion of the overall area of ​​the first panel 121, so that the first panel 121 is flat as a whole, which helps to improve the production efficiency of the lower box.

[0093] See also Figures 8 to 11 , Figure 8 A schematic diagram of the assembly structure of the heat exchange plate and the lower box from one perspective provided in some embodiments of the present application; Fig. 9 A schematic diagram of the assembly structure of the heat exchange plate and the lower box from another perspective provided in some embodiments of the present application; Fig.10 for Fig. 9 Schematic diagram of the cross-sectional structure along the BB direction; Fig.11 for Fig.10 Schematic diagram of the enlarged structure of the middle C part. According to some embodiments of the present application, the battery box 10 also includes a heat exchange plate 13, which is disposed between the battery cell 20 and the first panel 121, and is bonded to the surface of the first boss 1211 facing the heat exchange plate 13, and the heat exchange plate 13 is used for heat exchange with the battery cell 20.

[0094] Specifically, the heat exchange plate 13 has a heat exchange channel inside, and the heat exchange channel is used to circulate a heat exchange medium, which may be water, air or coolant, etc. The heat exchange medium can exchange heat with the battery cell 20 during the flow in the heat exchange channel.

[0095] By bonding and connecting the first boss 1211 with the heat exchange plate 13 on one side surface thereof facing the heat exchange plate 13 to form an integrated structure, when the battery cell 20 is accommodated in the accommodating cavity and the battery cell 20 is in contact and connected with the large surface of the heat exchange plate 13, the heat exchange plate 13 and the lower box body 12 can simultaneously bear the weight of the battery cell 20, thereby improving the overall supporting performance of the lower box body 12, thereby further improving the load-bearing capacity of the lower box body 12 and further reducing the risk of deformation of the lower box body 12 due to the heavy load-bearing.

[0096] See also Figures 8 to 11 According to some embodiments of the present application, the heat exchange plate 13 includes a first plate 131 and a second plate 132, the first plate 131 is connected to the battery cell 20, the first plate 131 is a flat plate and is located between the second plate 132 and the lower box, the second plate 132 is provided with a flow channel area 1321 and a connection area 1322, in the flow channel area 1321, the first plate 131 and the second plate 132 are spaced apart to form a fluid channel 133, in the connection area 1322, the first plate 131 and the second plate 132 are tightly connected; the connection area 1322 is connected to the first boss 1211.

[0097] The fluid channel 133 between the first plate 131 and the second plate 132 of the heat exchange plate 13 is used to circulate the heat exchange medium, and the heat exchange medium can circulate in the fluid channel 133, so as to exchange heat for the battery cell 20. Among them, the first plate 131 is a flat plate and is supported on the bottom of the battery cell 20. The first plate 131 and the second plate 132 are tightly connected through the connection area 1322 to seal the fluid channel 133, and the connection area 1322 of the second plate 132 is connected to the first boss 1211, so that the first boss 1211 can transmit the supporting force to the battery cell 20 through the second plate 132 and the first plate 131 in sequence, which is not only convenient for stabilizing the support of the battery cell 20, but also helps to increase the contact area with the battery cell 20 because the first plate 131 is a flat plate, thereby improving the heat exchange efficiency of the battery cell 20.

[0098] See also Figure 8 and Fig. 9 According to some embodiments of the present application, there are multiple connection areas 1322 , and the multiple connection areas 1322 are arranged at intervals, and a flow channel area 1321 is arranged between adjacent connection areas 1322 .

[0099] Multiple connection areas 1322 are arranged corresponding to multiple groups of first bosses 1211, each group of first bosses 1211 is connected to a connection area 1322, and the flow channel area 1321 between adjacent connection areas 1322 does not correspond to the first protrusion, which helps to improve the uniformity of support for multiple battery cells 20 and reduce the risk of crushing and blockage of the flow channel area 1321 due to stress concentration when subjected to force.

[0100] According to some embodiments of the present application, a groove is formed in the connection area 1322 , and the first boss 1211 extends into the groove and is connected to the connection area 1322 .

[0101] That is, the connection area 1322 is recessed relative to the flow channel area 1321 in a direction away from the first boss 1211 to form a groove.

[0102] The first boss 1211 extends into the groove and is connected to the connection area 1322, which not only helps to improve the connection reliability, but also helps to reduce the gap between the heat exchange plate 13 and the first panel, thereby facilitating the connection between the heat exchange plate 13 and the first panel.

[0103] According to some embodiments of the present application, the area of ​​the flow channel region 1321 accounts for more than 50% of the overall area of ​​the heat exchange plate 13 .

[0104] The above arrangement helps to increase the flow area of ​​the heat exchange medium in the flow channel area 1321 , thereby helping to improve the heat exchange efficiency of the battery cell 20 .

[0105] According to some embodiments of the present application, the battery box 10 further includes a support assembly 124 , at least a portion of the support assembly 124 is disposed between the first panel 121 and the heat exchange plate 13 for supporting the heat exchange plate 13 .

[0106] As an example, the support assembly 124 may include a plurality of support ribs, support plates, or support blocks.

[0107] By arranging at least part of the supporting assembly 124 between the first panel 121 of the lower box 12 and the heat exchange plate 13, for example, between the other areas of the first panel 121 except the first boss 1211 and the heat exchange plate 13, not only the overall rigidity of the lower box 12 can be further improved, but also the heat exchange plate 13 can be supported, and the distance and shape between the heat exchange plate 13 and the first panel 121 except the first boss 1211 can be maintained, so as to reduce the risk of deformation of the heat exchange plate 13 when bearing a large load, further improve the bearing capacity of the lower box 12, and thus further reduce the risk of deformation of the lower box 12 due to a large load.

[0108] See also Figure 3 and Figure 4 According to some embodiments of the present application, the support assembly 124 includes a plurality of transverse reinforcing ribs 1241 and a plurality of longitudinal reinforcing ribs 1242, the plurality of transverse reinforcing ribs 1241 are spaced apart along a first direction of the lower box body 12, the plurality of longitudinal reinforcing ribs 1242 are spaced apart along a second direction of the lower box body 12, and are all connected to the plurality of transverse reinforcing ribs 1241, and the second direction is arranged to intersect with the first direction.

[0109] A plurality of transverse reinforcing ribs 1241 and a plurality of longitudinal beam reinforcing ribs are staggered and connected between the first panel 121 and the heat exchange plate 13, so that the support for the heat exchange plate 13 is more stable and the force on the heat exchange plate 13 is more uniform when bearing weight, thereby further improving the overall rigidity of the lower box body 12 and the stability when bearing weight.

[0110] See also Figures 4 to 7 , Figure 5 A schematic structural diagram of a lower box body from another perspective provided in some embodiments of the present application; Figure 6 A structural schematic diagram of a lower box provided in some embodiments of the present application from another perspective; Figure 7 for Figure 6 According to some embodiments of the present application, part of the transverse reinforcing ribs 1241 and / or part of the longitudinal reinforcing ribs 1242 are arranged to penetrate the side wall surface of the cavity 1212 and abut against the bottom wall surface of the cavity 1212 .

[0111] Part of the transverse reinforcing ribs 1241 provided corresponding to the first boss 1211 penetrates the side wall of the concave cavity 1212 formed on the side of the first boss 1211 away from the heat exchange plate 13, or part of the longitudinal reinforcing ribs 1242 provided corresponding to the first boss 1211 penetrates the side wall of the concave cavity 1212 formed on the side of the first boss 1211 away from the heat exchange plate 13, or part of the transverse reinforcing ribs 1241 provided corresponding to the first boss 1211 and part of the longitudinal reinforcing ribs 1242 provided corresponding to the first boss 1211 simultaneously penetrate the side wall of the concave cavity 1212, so that the transverse reinforcing ribs 1241 and the longitudinal reinforcing ribs 1242 are continuous reinforcing ribs without interruption in the middle, and the overall rigidity is better, so that the support assembly 124 can bear the load of the heat exchange plate 13 and the battery cell 20 located above the heat exchange plate 13 more stably.

[0112] See also Figure 4 According to some embodiments of the present application, along the direction from the first panel 121 to the heat exchange plate 13, the side surface of the transverse reinforcing rib 1241 and / or the longitudinal reinforcing rib 1242 facing the heat exchange plate 13 does not exceed the side surface of the first boss 1211 facing the heat exchange plate 13.

[0113] Since the first panel 121 has a certain thickness, part of the transverse reinforcing ribs 1241 and / or part of the longitudinal reinforcing ribs 1242 penetrate the side wall of the concave cavity 1212 and abut against the side surface of the first boss 1211 facing away from the heat exchange plate 13. The side surface of the transverse reinforcing ribs 1241 and / or the longitudinal reinforcing ribs 1242 facing the heat exchange plate 13 does not exceed the side surface of the first boss 1211 facing the heat exchange plate 13. In this way, the top surface of the first boss 1211 (the side surface facing the heat exchange plate 13) can maintain an adhesive connection with the heat exchange plate 13, and the first boss 1211 and the heat exchange plate 13 can bear the weight of the battery cell 20 at the same time.

[0114] According to some embodiments of the present application, the support assembly 124 is integrally formed with the lower box body 12 .

[0115] The support assembly 124 and the lower box body 12 can be integrally formed by injection molding or hot pressing, which is not only convenient for processing and molding and suitable for mass production, but also helps to improve the overall rigidity of the lower box body 12, and simplifies the assembly and connection steps, thereby improving production efficiency.

[0116] See also Figure 3 According to some embodiments of the present application, the lower box body 12 also includes a plurality of side panels 122 arranged around the first panel 121, each side panel 122 is folded in a direction away from the accommodating cavity to form a flange 123, and the flange 123 is provided with a plurality of connection holes 1231 at intervals, and the connection holes 1231 are used to be fixedly connected to the upper box body 11 of the battery box 10 through a first fastener.

[0117] Illustratively, the first fastener may be a rivet or a bolt.

[0118] A plurality of side panels 122 are arranged around the first panel 121, so as to enclose a receiving cavity for receiving the battery cell 20. Each side panel 122 is folded away from the receiving cavity to form a flange 123, and a plurality of first connection holes 1231 are arranged at intervals on the flange 123, so as to facilitate the fixed connection between the lower box body 12 and the upper box body 11 through the first fastener, and the structure and principle are relatively simple and easy to implement.

[0119] See also Figure 3 According to some embodiments of the present application, a plurality of spaced-apart limiting grooves 1232 are defined on opposite sides of the lower box body 12, a connecting column 1233 is provided in the limiting groove 1232, the connecting column 1233 is defined with a threaded hole, the threaded hole penetrates the connecting column 1233 along the axial direction of the connecting column 1233, and is used to be fixedly connected to the upper box body 11 of the battery box 10 through a second fastener.

[0120] Exemplarily, the limiting grooves 1232 are disposed on both sides of the lower box body 12 along the second direction, and two connecting columns 1233 are disposed in each limiting groove 1232 .

[0121] Illustratively, the second fastener may be a screw or a bolt.

[0122] The lower box body 12 is fixedly connected to the upper box body 11 by means of a plurality of first fasteners passing through a plurality of connection holes 1231 on the flange 123, and is also fixedly connected to the upper box body 11 by means of a plurality of second fasteners passing through threaded holes on the connection columns 1233, thereby further improving the connection strength between the lower box body 12 and the upper box body 11. The structure and principle are relatively simple and easy to implement.

[0123] According to some embodiments of the present application, the present application also provides a battery device 100, including: a battery box 10, the battery box 10 includes a lower box body 12 and a heat exchange plate 13, and the battery cell 20 is installed on the side of the heat exchange plate 13 away from the lower box body 12; wherein the lower box body 12 is a non-metallic part, and the lower box body 12 has a first panel 121, and the first panel 121 is the panel with the largest area in the lower box body 12, and the first panel 121 is provided with a first boss 1211, and the first boss 1211 partially protrudes from the first panel 121 in the direction of the battery cell 20, and a concave cavity 1212 is formed on the side of the first boss 1211 away from the battery cell 20; the first panel 121 is provided with a first surface and a second surface along the thickness direction, the first surface is a surface facing the battery cell 20, the first surface includes a first plane and a first reinforcing rib, and the second surface includes a second plane and a second reinforcing rib; a first reinforcing rib is provided between the heat exchange plate 13 and the second plane.

[0124] By providing a first boss 1211 on the first panel 121 of the lower box 12, the overall rigidity of the lower box 12 can be improved. The first boss 1211 is connected to the heat exchange plate 13. The battery cell 20 is installed on the side of the heat exchange plate 13 away from the first panel 121. The first boss 1211 can support the battery cell 20 through the heat exchange plate 13. By providing a first reinforcing rib on the first plane (the area except the first boss 1211), the first reinforcing rib plays a role in further strengthening the rigidity of the lower box 12 and improving the support stability of the heat exchange plate 13. In addition, by providing a second reinforcing rib on the second plane (the side of the first boss 1211 away from the heat exchange plate 13), the second reinforcing rib plays a role in supporting the first boss 1211, thereby further improving the support stability of the first boss 1211 on the heat exchange plate 13 and the battery cell 20.

[0125] According to some embodiments of the present application, see Figures 2 to 11 The present application provides a battery device, including a battery box 10 and a battery cell 20 accommodated in the battery box 10. The battery box 10 includes a lower box body 12 and a heat exchange plate 13, the lower box body 12 includes a first panel 121 and a support assembly 124, wherein the lower box body 12 is a non-metallic part, and the lower box body 12 has a first panel 121, the first panel 121 is the panel with the largest area in the lower box body 12, the first panel 121 is provided with a plurality of first bosses 1211, and the plurality of first bosses 1211 all protrude from the first panel 121 toward the direction where the battery cell 20 is located, and the support assembly 124 includes a first panel 121 and a heat exchange plate 13. The heat exchange plate 13 has a plurality of transverse reinforcing ribs 1241 and a plurality of longitudinal reinforcing ribs 1242 formed in the lower box body 12, and the plurality of transverse reinforcing members are arranged at intervals along the first direction of the lower box body 12 and extend along the second direction of the lower box body 12, and the plurality of longitudinal reinforcing ribs 1242 are arranged at intervals along the second direction of the lower box body 12 and extend along the first direction of the lower box body 12, and part of the transverse reinforcing ribs 1241 are arranged to penetrate the first boss 1211 along the second direction, and part of the longitudinal reinforcing ribs 1242 are arranged to penetrate the first boss 1211 along the first direction. The surface of one side of the heat exchange plate 13 facing the first panel 121 is bonded to the first boss 1211, and the support assembly 124 is supported on the side of the heat exchange plate 13 facing the first panel 121. Through the technical solution of the present application, when the lower box body 12 is a non-metallic part, the load-bearing capacity of the lower box body 12 can be improved, the weight of the battery box 10 can be reduced, and the processing technology of the battery box 10 can be simplified, the production efficiency can be improved, and the production cost can be reduced.

[0126] The above is only a preferred specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present application should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery device, characterized in that: include: A battery box, the battery box comprising a lower box body, the lower box body defining a receiving cavity; A battery cell is accommodated in the accommodation cavity. Among them, the lower box body is a non-metallic part, and the lower box body has a first panel. The first panel is the panel with the largest area in the lower box body. The first panel is provided with a first boss, and the first boss partially protrudes from the first panel toward the direction of the battery cell. A concave cavity is formed on the side of the first boss away from the battery cell.

2. The battery device according to claim 1, characterized in that: There are multiple first bosses, which are divided into multiple groups. The multiple groups of first bosses are spaced apart along the first direction of the lower box body, and each group of first bosses includes multiple first bosses spaced apart along the second direction of the lower box body, and the second direction intersects with the first direction.

3. The battery device according to claim 2, characterized in that: The projection area of ​​the plurality of first bosses on the first panel accounts for less than 50% of the overall projection area of ​​the first panel.

4. The battery device according to any one of claims 1 to 3, characterized in that: The battery box further includes a heat exchange plate, which is disposed between the battery cell and the first panel and is adhesively connected to a surface of the first boss facing the heat exchange plate. The heat exchange plate is used for heat exchange with the battery cell.

5. The battery device according to claim 4, characterized in that: The heat exchange plate includes a first plate and a second plate, the first plate is connected to the battery cell, the first plate is a flat plate and is located between the second plate and the lower box, the second plate is provided with a flow channel area and a connection area, in the flow channel area, the first plate and the second plate are spaced apart to form a fluid channel, in the connection area, the first plate and the second plate are tightly connected; the connection area is connected to the first boss.

6. The battery device according to claim 5, characterized in that: There are multiple connection areas, and the multiple connection areas are arranged at intervals, and the flow channel area is arranged between adjacent connection areas.

7. The battery device according to claim 5, characterized in that: The connection area is formed with a groove, and the first boss extends into the groove and is connected to the connection area.

8. The battery device according to claim 5, characterized in that: The area of ​​the flow channel region accounts for more than 50% of the overall area of ​​the heat exchange plate.

9. The battery device according to claim 4, characterized in that: The battery box further includes a support assembly, at least a portion of which is disposed between the first panel and the heat exchange plate for supporting the heat exchange plate.

10. The battery device according to claim 9, characterized in that: The support assembly includes a plurality of transverse reinforcing ribs and a plurality of longitudinal reinforcing ribs, wherein the plurality of transverse reinforcing ribs are spaced apart along a first direction of the lower box body, and the plurality of longitudinal reinforcing ribs are spaced apart along a second direction of the lower box body and are all connected to the plurality of transverse reinforcing ribs, and the second direction is arranged to intersect with the first direction.

11. The battery device according to claim 10, characterized in that: Part of the transverse reinforcing ribs and / or part of the longitudinal reinforcing ribs are arranged to penetrate the side wall surface of the concave cavity and abut against the bottom wall surface of the concave cavity.

12. The battery device according to claim 10, characterized in that: Along the direction from the first panel to the heat exchange plate, a surface of the transverse reinforcing rib and / or the longitudinal reinforcing rib facing the heat exchange plate does not exceed a surface of the first boss facing the heat exchange plate.

13. The battery device according to claim 9, characterized in that: The support assembly and the lower box body are integrally formed.

14. The battery device according to any one of claims 1 to 3, characterized in that: The lower box body also includes a plurality of side panels arranged around the first panel, each of the side panels is folded in a direction away from the accommodating cavity to form a flange, and the flanges are provided with a plurality of connection holes at intervals, and the connection holes are used to be fixedly connected to the upper box body of the battery box through a first fastener.

15. The battery device according to any one of claims 1 to 3, characterized in that: The lower box body is defined with a plurality of spaced apart limiting grooves on opposite sides thereof, wherein connecting columns are provided in the limiting grooves, and the connecting columns are defined with threaded holes, which penetrate the connecting columns along the axial direction of the connecting columns and are used for fixed connection with the upper box body of the battery box through a second fastener.

16. A battery device, characterized in that: include: Battery cells; A battery box, the battery box comprising a lower box body and a heat exchange plate, the battery cells being mounted on a side of the heat exchange plate away from the lower box body; The lower box is a non-metallic part, and has a first panel. The first panel is the panel with the largest area in the lower box. The first panel is provided with a first boss. The first boss partially protrudes from the first panel toward the direction where the battery cell is located, and a concave cavity is formed on the side of the first boss away from the battery cell. The first panel is provided with a first surface and a second surface on both sides along the thickness direction, the first surface is a surface facing the battery cell, the first surface includes a first plane and a first reinforcing rib, the second surface includes a second plane and a second reinforcing rib, and the second reinforcing rib is provided on a side of the first boss away from the heat exchange plate; A first reinforcing rib is arranged between the heat exchange plate and the second plane.

17. An electrical device, characterized in that: It comprises the battery device according to any one of claims 1 to 15 or the battery device according to claim 16, wherein the battery device is used to supply power to the electrical device.

Images