Battery device and electric equipment

Abstract

The utility model discloses a battery device and electric equipment, the battery device comprises a box body (110), a battery monomer (120) arranged in the box body (110) and a temperature adjusting part (130) arranged between the battery monomer (120) and a box bottom (10) of the box body (110), the box bottom (10) of the box body (110) comprises a plurality of strip-shaped sunken parts (1) which are arranged in parallel and at intervals, the temperature adjusting part (130) comprises a heat exchange piece which is laid in the strip-shaped concave part (1) and is used for adjusting the temperature of the battery monomers (120); each supporting part (2) is formed between every two adjacent strip-shaped concave parts (1), each supporting part comprises a first wall layer (21) and a second wall layer (22), the first wall layers (21) and the second wall layers (22) are arranged in the thickness direction of the box bottom (10) and connected, and the first wall layers (21) and the second wall layers (22) are at least partially arranged in a spaced mode to form buffer cavities (23).

Description

TECHNICAL FIELD

[0001] The utility model relates to battery technology field, specifically, battery device and electric equipment. BACKGROUND

[0002] The battery device has the risk of being collided by external objects during use, and is prone to risks after being collided by external objects. SUMMARY

[0003] The utility model aims at providing a kind of high-strength battery device and electric equipment for improving anti-bump.

[0004] According to an aspect of the embodiment of the utility model, the utility model provides a kind of battery device, battery device includes box, battery monomer being arranged in box and temperature adjusting part being arranged between battery monomer and the bottom of box of box, the bottom of box includes: multiple strip recessed parts, parallel and interval arrangement, temperature adjusting part includes the heat exchange element for adjusting the temperature of battery monomer being laid in strip recessed part;Support part is formed between the two strip recessed parts of adjacent, support part includes first wall layer and second wall layer being arranged along the thickness direction of bottom and being connected with first wall layer, first wall layer and second wall layer are at least partially spaced to form buffer cavity.In the position of the strip recessed part of bottom, heat exchange element is arranged, heat exchange element can effectively alleviate the collision and impact of external, to protect battery monomer from being damaged, so it can be seen that the battery device of the embodiment can effectively improve the impact resistance and safety of battery device.Temperature adjusting part for adjusting the temperature of battery monomer is arranged in the inside of box, reduces the path of heat conduction, is favorable to improve the heat exchange efficiency with battery monomer, reduces the path of heat conduction.Favorable to reduce the overall height of battery device, reduce the volume of battery device and improve the energy density of battery device.

[0005] In some embodiments, the first wall layer is connected to the bottom wall of the strip recessed part to form a plate-like structure, or the first wall layer is integrally formed with the bottom wall of the strip recessed part, and the second wall layer includes a strip-shaped component parallel to the strip recessed part, the cross section of the strip-shaped component is a curved structure arched relative to the plate-like structure to form a buffer cavity with the first wall layer. The first wall layer and the bottom wall of the strip recessed part are an integral structure, reducing the risk of corrosion and prolonging the service life of the battery device. Further, the first wall layer is connected to the bottom wall of the strip recessed part to form a plate-like structure, or the first wall layer is integrally formed with the bottom wall of the strip recessed part, which has the advantages of high structural strength and good sealing performance. Further, the first wall layer is integrally formed with the bottom wall of the strip recessed part, which is also conducive to reducing the number of components of the battery device and simplifying the assembly process. The heat exchange element is arranged between the two strip-shaped components, so that the advantages of anti-collision and reducing the volume can be achieved under the premise of saving materials and space.

[0006] In some embodiments, the second wall layer comprises wall bodies arranged in parallel with the first wall layer and connected parts arranged at ends of the wall bodies along the width direction of the strip-shaped part, the connected parts being connected to the plate-shaped structure, and a strip-shaped recess being formed between two adjacent wall bodies. The parallel arrangement of the first wall layer and the wall bodies is conducive to increasing the area of the buffer cavity formed by the two, and is conducive to increasing the area of the bottom protection and buffer of the battery box.

[0007] In some embodiments, the second wall layer further comprises a transition part connected by the ends of the wall bodies and extending to the connected part, and an end of the transition part away from the wall body being connected to the connected part. The transition part extends from the wall body to the plate-shaped structure, and the inclination of the transition part relative to the thickness of the box bottom is also conducive to increasing the area of the cross section of the buffer cavity parallel to the box bottom and the area of the support surface of the top of the support part.

[0008] In some embodiments, the structures of the at least two strip-shaped parts are the same. The design of the strip-shaped part as a universal part reduces the mold cost and improves the production efficiency.

[0009] In some embodiments, the first wall layer is connected to the bottom wall of the strip-shaped recess to form a high-low plate-shaped structure, the low part of the plate-shaped structure forming the bottom wall of the strip-shaped recess, the high part of the plate-shaped structure forming the first wall layer of the support part, and the second wall layer being attached to the bottom surface of the plate-shaped structure. The connection of the first wall layer to the bottom wall of the strip-shaped recess forms a high-low plate-shaped structure, which is conducive to improving the torsional resistance to enhance the strength. The attachment of the second wall layer to the bottom surface of the plate-shaped structure is conducive to improving the strength of the structure while forming an impact-resistant buffer cavity.

[0010] In some embodiments, the plurality of second wall layers are connected together to form a plate-shaped part. This is conducive to simplifying the installation steps and improving the production efficiency.

[0011] In some embodiments, the box further comprises a side wall connected to the plate-shaped structure, and the plate-shaped structure and the side wall form a basin-shaped structure. The overall basin-shaped structure is conducive to ensuring the sealing of the battery device and preventing foreign matter or liquid from entering the interior of the battery device to affect the performance of the battery device.

[0012] In some embodiments, the second wall layer is provided with an electrophoretic liquid via hole for the flow of electrophoretic liquid in communication with the buffer cavity. The electrophoretic liquid can flow into or out of the interior of the buffer cavity through the electrophoretic liquid via hole, so as to perform electrophoresis on the inner wall surface of the buffer cavity, and form an electrophoretic protective layer on the surface of the first wall layer facing the second wall layer and the surface of the second wall layer facing the first wall layer, thereby improving the corrosion resistance of the bottom plate assembly. Further, the electrophoretic liquid via hole is conducive to ensuring smooth entry and exit of the electrophoretic liquid during the electrophoresis process. This design avoids the accumulation of electrophoretic liquid inside the buffer cavity, and improves the electrophoresis effect.

[0013] In some embodiments, the top surface of the heat exchange member is flush with the top surface of the support portion. This helps ensure the firmness of the bonding of the battery cell and avoids the problem of poor bonding caused by inconsistent height.

[0014] According to another aspect of the present application, there is also provided a power consuming device comprising the battery device described above.

[0015] The technical scheme of the present application is applied, the box body comprises a strip-shaped recessed portion and a support portion, the support portion is a double-layer structure composed of a first wall layer and a second wall layer, and a buffer cavity is arranged between the two layers to buffer external collision or impact, and a heat exchange member is arranged at the position of the strip-shaped recessed portion of the box bottom, the heat exchange member can effectively alleviate external collision and impact to protect the battery monomer from being damaged, so it can be seen that the battery device of the present embodiment can effectively improve the impact resistance and safety of the battery device.

[0016] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained according to these drawings without creative labor for those skilled in the art.

[0018] Figure 1 A structure schematic diagram of a power consuming device disclosed by some embodiments of the present application is shown.

[0019] Figure 2 An exploded structure schematic diagram of a battery device disclosed by some embodiments of the present application is shown.

[0020] Figure 3 A structure schematic diagram of a battery monomer disclosed by some embodiments of the present application is shown.

[0021] Figure 4 A top view structure schematic diagram of a box body of a battery device and a temperature adjusting portion arranged in the box body disclosed by some embodiments of the present application is shown.

[0022] Figure 5 A top view structure schematic diagram of a box body of a battery device disclosed by some embodiments of the present application is shown.

[0023] Figure 6The second wall layer structure diagram of the bottom wall of the box body of the battery device is shown.

[0024] Figure 7 The cross-sectional structure diagram of the box body of the battery device is shown.

[0025] Figure 8 The cross-sectional structure diagram of the box body of the battery device is shown. Figure 7 The enlarged view at A in the figure.

[0026] Figure 9 The top view structure diagram of the box body of the battery device and the temperature adjusting part arranged in the box body is shown.

[0027] Figure 10 The side view structure diagram of the box body of the battery device is shown.

[0028] Figure 11 The bottom view structure diagram of the box body of the battery device is shown.

[0029] Figure 12 The second wall layer structure diagram of the bottom wall of the box body of the battery device is shown.

[0030] Figure 13 The cross-sectional structure diagram of the box body of the battery device is shown.

[0031] Figure 14 The cross-sectional structure diagram of the box body of the battery device is shown. Figure 13 The enlarged view at B in the figure.

[0032] In the figure:

[0033] 1000, vehicle; 100, battery device; 110, box body; 111, first part; 112, second part; 120, battery monomer; 121, end cover; 121a, electrode terminal; 122, shell; 123, battery core assembly; 123a, tab; 130, temperature adjusting part; 131, strip-shaped section; 132, bending section; 140, hanging structure; 200, controller; 300, motor; 10, box bottom; 20, side wall; 1, strip-shaped recess; 2, support part; 21, first wall layer; 22, second wall layer; 221, wall main body; 222, connecting part; 223, transition part; 23, buffer cavity; 24, welding positioning part; 25, electrophoretic liquid via hole; 26, welding position. DETAILED DESCRIPTION

[0034] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. The description of the at least one exemplary embodiment is actually only illustrative, but not as any limitation on the present application and its application or use. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the present application; the use of the terms "including," "comprising," "having" and variations thereof herein is meant to encompass the inclusion of the recited elements but not the exclusion of others not recited.

[0036] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase that the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of other embodiments. It is explicitly contemplated that embodiments described herein can be combined with each other.

[0037] In the description of the present application, it should be noted that, unless otherwise specified, the meaning of "a plurality of" is more than two; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer" and the like are intended to facilitate the description of the present application and are not intended to indicate or imply that the device or element 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. In addition, the terms "first", "second", "third", etc. are only for descriptive purposes and cannot be understood as indicating or implying relative importance. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range.

[0038] The orientation words appearing in the following description are the directions shown in the drawings, and are not used to limit the specific structure of the utility model. In the description of the utility model, it should be explained that, unless otherwise specified and limited, the terms "mounting", "connection" and "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0039] Unless otherwise specified, the "including" and "containing" mentioned in the utility model mean open type, and can also be closed type. For example, the "including" and "containing" can mean that other components not listed can also be included or contained, or only the listed components can be included or contained.

[0040] Unless otherwise specified, in the utility model, the term "or" is inclusive. For example, the phrase "A or B" means "A, B, or both A and B". More specifically, any of the following conditions satisfies the condition "A or B": A is true (or exists) and B is false (or does not exist); A is false (or does not exist) and B is true (or exists); or A and B are both true (or exist).

[0041] At present, from the development of market situation, the application of power battery is more and more extensive. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0042] Figure 1 A structure schematic diagram of a power consumption equipment using a battery as a power source is shown; as Figure 1 As shown, the power consumption equipment of the embodiment includes a vehicle 1000, which can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom or 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 the operating power supply of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, the controller 200 is 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.

[0043] In some embodiments of the utility model, battery device 100 can not only be used as the operating power source of vehicle 1000, but also be used as the driving power source of vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for vehicle 1000.

[0044] Please refer to Figure 2 , Figure 2 The utility model provides the explosion map of battery device 100. Battery device 100 includes box body 110 and the battery module of being arranged in box body 110, and the battery module includes multiple battery monomers 120, and battery monomer 120 is contained in box body 110. Among them, box body 110 is used to provide the containing space for battery monomer 120, and box body 110 can adopt multiple structures. In some embodiments, box body 110 can include first part 111 and second part 112, first part 111 and second part 112 are mutually covered, and first part 111 and second part 112 jointly define the containing space for containing battery monomer 120. Second part 112 can be the hollow structure of one end opening, and first part 111 can be the plate structure, and first part 111 is covered in the opening side of second part 112, so that first part 111 and second part 112 jointly define the containing space, and first part 111 and second part 112 can also be the hollow structure of one side opening, and the opening side of first part 111 is covered in the opening side of second part 112. Of course, the box body 110 formed by first part 111 and second part 112 can be multiple shapes, such as cylinder, cuboid, etc.

[0045] In battery device 100, multiple battery monomers 120 can be connected in series or parallel or mixed connection, and mixed connection means that multiple battery monomers 120 are connected in series and parallel. Multiple battery monomers 120 can be directly connected in series or parallel or mixed connection together, and then the whole of multiple battery monomers 120 is contained in box body 110. Of course, battery device 100 can also be that multiple battery monomers 120 are connected in series or parallel or mixed connection to form a battery module, and multiple battery modules are connected in series or parallel or mixed connection to form a whole, and then contained in box body 110. Battery device 100 can also include other structures, for example, the battery device 100 can also include a busbar component for realizing the electrical connection between multiple battery monomers 120.

[0046] Each battery monomer 120 can be a secondary battery or a primary battery, and can also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery monomer 120 can be in the shape of a cylinder, a flat body, a cuboid or other shapes.

[0047] Please refer to Figure 3 , Figure 3This is an exploded structural diagram of a battery cell 120 provided in some embodiments of the present invention. The battery cell 120 refers to the smallest unit constituting the battery device 100. For example... Figure 3 The battery cell 120 includes an end cap 121, a housing 122, a cell assembly 123, and other functional components.

[0048] End cap 121 refers to a component that covers the opening of housing 122 to isolate the internal environment of battery cell 120 from the external environment. The shape of end cap 121 can be adapted to the shape of housing 122 to fit it. Optionally, end cap 121 can be made of a material with certain hardness and strength, such as aluminum alloy, so that end cap 121 is less prone to deformation under pressure and impact, giving battery cell 120 higher structural strength and improved safety performance. Functional components such as electrode terminals 121a can be provided on end cap 121. Electrode terminals 121a can be used for electrical connection with cell assembly 123 for outputting or inputting electrical energy from battery cell 120. In some embodiments, end cap 121 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 120 reaches a threshold. The end cap 121 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this embodiment of the present invention does not impose any special limitations on this. In some embodiments, an insulating member can also be provided on the inner side of the end cap 121. The insulating member can be used to isolate the electrical connection components inside the housing 122 from the end cap 121 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.

[0049] The housing 122 is a component used to cooperate with the end cap 121 to form the internal environment of the battery cell 120, wherein the formed internal environment can accommodate the cell assembly 123, electrolyte, and other components. The housing 122 and the end cap 121 can be independent components. An opening can be provided on the housing 122, and the end cap 121 can be used to close the opening to form the internal environment of the battery cell 120. Alternatively, the end cap 121 and the housing 122 can be integrated. Specifically, the end cap 121 and the housing 122 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 122, the end cap 121 closes the housing 122. The housing 122 can have various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 122 can be determined according to the specific shape and size of the cell assembly 123. The shell 122 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This embodiment of the utility model does not impose any special restrictions on this.

[0050] The cell assembly 123 is a component in which electrochemical reactions occur in the battery cell 120. One or more cell assemblies 123 can be contained within the case 122. The cell assembly 123 is mainly formed by winding or stacking an electrode sheet, which includes a positive electrode sheet and a negative electrode sheet, with an interleaf film disposed therebetween.

[0051] The electrode sheet mainly includes a thin sheet-shaped current collector and an active material coated on the current collector. The positive electrode sheet (cathode electrode sheet) and the negative electrode sheet (anode electrode sheet) have portions with active materials that constitute a main body of the cell assembly, and portions without active materials that each constitute a tab 123a. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the tabs 123a connect the electrode terminals to form a current loop.

[0052] During use of the battery device 100, there is a risk of collision, scratching, and impact by objects in the external environment. If the strength of the case 110 of the battery device 100 is not sufficient and damage occurs, the battery cell 120 or the circuit within the battery device 100 is easily damaged, which can lead to unexpected risks. In particular, when the battery device is used for a vehicle, the battery device 100 is installed at the bottom of the vehicle, and debris on the road or protrusions on the ground can easily impact the battery device 100. Such damage is global and the location is not confirmed. To detect the strength of the battery device, the battery device design requires that the strength of the battery device be detected by a test in which a steel ball impacts the bottom of the case (referred to as a bottom ball test), i.e., a 30 mm diameter steel ball with 150 J energy is used to impact the battery device, and the battery device 100 is required to have no damage.

[0053] To improve the strength of the battery device 100 to meet the requirements of the steel ball test and improve the safety of the battery device 100, the present embodiment provides a new type of battery device, as shown in Figures 4 to 8 The battery device includes a case 110, a battery cell 120 disposed within the case 110, and a temperature adjusting portion 130 disposed between the battery cell 120 and the case bottom 10 of the case 110, and the case bottom 10 of the case 110 includes a plurality of strip-shaped recessed portions 1 and a support portion 2.

[0054] The two strip-shaped recessed portions 1 are arranged at intervals, and the temperature adjusting portion 130 includes a heat exchange member laid in the strip-shaped recessed portion 1;

[0055] The support portion 2 is formed between the two adjacent strip-shaped recessed portions 1, and the support portion includes a first wall layer 21 and a second wall layer 22 arranged along the thickness direction of the case bottom 10 and connected to the first wall layer 21, and the first wall layer 21 and the second wall layer 22 are at least partially arranged at intervals to form a buffer cavity 23.

[0056] Battery cell 120 refers to the smallest unit that constitutes battery device 100. As shown in FIG. 1, battery cell 120 includes end cover 121, shell 122, cell assembly 123, and other functional components. Figure 3 Battery cell 120 includes end cover 121, shell 122, cell assembly 123, and other functional components.

[0057] Strip-shaped recess 1 refers to the area of bottom 10 that is lower than support portion 2, and is used to set a heat exchange member for adjusting the temperature of battery cell 120. Support portion 2 is the part of bottom 10 that supports battery cell 120, and support portion 2 supports battery cell 120 in tank 110 together with the heat exchange member in strip-shaped recess 1.

[0058] In the technical solution of the present embodiment, tank 110 includes strip-shaped recess 1 and support portion 2, support portion 2 is a double-layer structure composed of first wall layer 21 and second wall layer 22, and has buffer cavity 23 between the two layers to buffer external impact or shock, and also improves the performance of resisting steel ball impact and ensures the integrity of the battery device when it is impacted. The heat exchange member is arranged at the position of strip-shaped recess 1 of bottom 10, which can effectively alleviate external impact and shock to protect battery cell 120 from being damaged. Therefore, battery device 100 of the present embodiment can effectively improve the impact resistance and safety of the battery device.

[0059] Further, temperature adjustment portion 130 for adjusting the temperature of battery cell 120 is arranged inside tank 110, which reduces the path of heat conduction and is conducive to improving the heat exchange efficiency with battery cell 120 and reducing the path of heat conduction.

[0060] Further, temperature adjustment portion 130 is arranged in strip-shaped recess 1, which uses temperature adjustment portion 130 to adjust the temperature (e.g., cooling) of battery cell 120 while protecting battery cell 120 from being damaged, which is conducive to reducing the overall height of the battery device and reducing the volume and improving the energy density of battery device 100, compared with separately arranging a heat exchange plate for circulating heat exchange medium.

[0061] In some embodiments, the heat exchange member includes a heat exchange pipe for circulating medium for cooling the battery cell, and the medium can be water.

[0062] In other embodiments, the heat exchange member includes a heat exchange plate. In some embodiments, the heat exchange plate is provided with a flow path for circulating medium for cooling the battery cell, and the medium can be water. The flow path for circulating medium for cooling the battery cell extends in a direction parallel to strip-shaped recess 1.

[0063] In some embodiments, the first wall layer 21 is connected with the bottom wall of the strip-shaped recess 1 to form a plate structure, or the first wall layer 21 is integrally formed with the bottom wall of the strip-shaped recess 1, and the second wall layer 22 includes a strip-shaped component parallel to the strip-shaped recess 1, and the cross section of the strip-shaped component is a curved structure arched relative to the plate structure to form the buffer cavity 23 with the first wall layer 21.

[0064] The plate structure refers to a structure with a thickness (or height) much smaller than a length and a width, and the plate structure can be a flat surface or a slightly concave-convex surface.

[0065] The strip-shaped component refers to a structure with a length much greater than a height and a width, and the strip-shaped component can be a solid core structure or a hollow core structure. In this application, the strip-shaped component is a hollow core structure, which surrounds the buffer cavity 23 with the plate structure. The cross section of the strip-shaped component can be circular, rectangular, or the like.

[0066] The first wall layer 21 and the bottom wall of the strip-shaped recess 1 are an integral plate structure (integrally formed structure), and the second wall layer 22 is arranged on the inner side of the plate structure to form the buffer cavity 23, thereby reducing the risk of corrosion and prolonging the service life of the battery device 100.

[0067] Further, the first wall layer 21 is connected with the bottom wall of the strip-shaped recess 1 to form a plate structure, or the first wall layer 21 is integrally formed with the bottom wall of the strip-shaped recess 1, which has the advantages of high structural strength and good sealing performance. Further, the first wall layer 21 is integrally formed with the bottom wall of the strip-shaped recess 1, which is also conducive to reducing the number of parts of the battery device and simplifying the assembly process.

[0068] In some technical solutions, a buffer cavity is formed between the two integral plates. Compared with the above-mentioned solution, the second wall layer forming the buffer cavity is a plurality of strip-shaped components, and a heat exchange element is arranged between adjacent two strip-shaped components. Therefore, the advantages of anti-collision and reducing the volume can be achieved on the premise of saving materials and space.

[0069] Further, compared with the scheme of mounting the bottom guard plate on the outer side of the box bottom 10 through a threaded connecting piece, the scheme of the present embodiment reduces the complexity of the assembly process and improves the production efficiency.

[0070] In some embodiments, the second wall layer 22 includes a wall body 221 arranged in parallel with and spaced apart from the first wall layer 21, and a connecting portion 222 arranged at the end of the wall body 221 along the width direction of the strip-shaped component, the connecting portion 222 is connected with the plate structure, and the strip-shaped recess 1 is formed between adjacent two wall bodies 221.

[0071] The first wall layer 21 and the wall body 221 are arranged in parallel, which is conducive to increasing the area of the buffer cavity formed by the two, increasing the protection and buffering area of the bottom of the battery box.

[0072] The second wall layer 22 is parallel to the first wall layer 21, and the top of the second wall layer 22 forms a support plane for supporting the battery monomer 120. The support planes of the plurality of second wall layers 22 are flush, which ensures the firmness of the battery cell bonding and avoids the problem of poor bonding caused by inconsistent height.

[0073] In some embodiments, the second wall layer 22 further includes a transition portion 223 connected by the end of the wall body 221 and extending to the connecting portion 222. The end of the transition portion 223 away from the wall body 221 is connected to the connecting portion 222. The transition portion 223 extends from the wall body to the plate structure, and the inclination of the transition portion relative to the thickness of the box bottom is also conducive to increasing the area of the cross section of the buffer cavity parallel to the bottom of the box and the area of the support surface of the top of the support portion 2.

[0074] The wall body 221, the connecting portion 222 and the transition portion 223 form an overall U-shaped structure, and the connecting portion 222 at both ends of the width direction of the wall body 221 is respectively welded to the above-mentioned plate structure to form a welding position 26.

[0075] The second wall layer 22 or the plate structure is provided with a welding positioning portion 24 for positioning the strip-shaped component forming the second wall layer 22 at a predetermined welding position.

[0076] In some embodiments, the second wall layer 22 is provided with an electrophoretic liquid via hole 25 for the flow of electrophoretic liquid, which communicates with the buffer cavity 23. The electrophoretic liquid can flow into or out of the inside of the buffer cavity 23 through the electrophoretic liquid via hole 25, so as to perform electrophoresis on the inner wall surface of the buffer cavity 23, and form an electrophoretic protective layer on the surface of the first wall layer 21 towards the second wall layer 22 and the surface of the second wall layer 22 towards the first wall layer 21, thereby improving the corrosion resistance of the bottom plate assembly.

[0077] The two ends in the length direction and / or the two ends in the width direction of the strip-shaped component forming the second wall layer 22 are respectively provided with an electrophoretic liquid via hole 25. The electrophoretic liquid can flow into or out of the inside of the buffer cavity 23 through the electrophoretic liquid via hole 25, so as to perform electrophoresis on the inner wall surface of the buffer cavity 23, and form an electrophoretic protective layer on the surface of the first wall layer 21 towards the second wall layer 22 and the surface of the second wall layer 22 towards the first wall layer 21, thereby improving the corrosion resistance of the bottom plate assembly. Further, the electrophoretic liquid via hole 25 is conducive to ensuring the smoothness of the electrophoretic liquid in and out during the electrophoresis. This design avoids the accumulation of electrophoretic liquid inside the buffer cavity, and improves the electrophoresis effect.

[0078] In some embodiments, at least two strip-shaped components used to form the second wall layer 22 described above have identical structures. The strip-shaped components are designed as universal parts, reducing mold costs and improving production efficiency.

[0079] The temperature regulating unit 130 includes a strip segment 131 extending along the strip-shaped recess 1, and the ends of two adjacent strips are connected by a bending segment 132 to form a serpentine heat exchanger. In some embodiments, the top surface of the heat exchanger is flush with the top surface of the support 2, which ensures the firmness of the battery cell bonding and avoids bonding problems caused by inconsistent heights.

[0080] In this embodiment, the housing 110 further includes a sidewall 20 connected to the plate-like structure, and the plate-like structure and the sidewall 20 form a basin-like structure. This basin-like structure is integrally formed; in some embodiments, it is integrally stamped. The overall basin-like structure helps ensure the sealing of the battery device, preventing external debris or liquids from entering the battery device 100 and affecting its performance.

[0081] In some embodiments, the outer side of the basin-shaped structure is further provided with a mounting structure 140 for fixing the battery device to the electrical equipment.

[0082] The strip-shaped components used to form the second wall layer 22 are located inside the basin-shaped structure. This avoids crevice corrosion and extends the service life of the battery device.

[0083] In this embodiment, the strip-shaped component (reinforcing plate) used to form the second wall layer has good impact resistance and corrosion resistance. The serpentine heat exchanger is made of a high thermal conductivity material, which improves heat exchange efficiency. A buffer cavity 23 is formed between the second wall layer 22 and the basin-shaped structure, which has a bottom ball resistance function and improves the stability of the overall structure.

[0084] The basin-shaped structure is made of high-strength aluminum alloy, offering excellent impact resistance and corrosion resistance. The stamped basin is spot-welded to the reinforcing plate, ensuring structural stability. The serpentine tube is bonded to the bottom of the basin with structural adhesive, improving heat exchange efficiency.

[0085] In summary, the technical solution of this embodiment has the following technical effects:

[0086] 1. A "U"-shaped bracket (second wall layer 22) is designed in the middle area of ​​each serpentine pipe (heat exchanger) as a reinforcing plate. The bracket is spot-welded to the basin-shaped structure. This design not only improves the stability of the structure but also ensures the strong bonding of the battery cells.

[0087] 2. The upper, lower, and left / right sides of the support are designed with 25mm electrophoresis solution passages to ensure smooth flow of the electrophoresis solution during electrophoresis. This design prevents the electrophoresis solution from accumulating inside the support, thus improving the electrophoresis effect.

[0088] 3. The upper surface of the bracket is flush with the upper surface of the serpentine pipe (heat exchange component), ensuring the firmness of the battery cell (battery monomer) bonding and avoiding the bonding problem caused by inconsistent height.

[0089] 4. The bracket with similar shape is designed as a universal component, reducing the mold cost and improving the production efficiency.

[0090] 5. The bracket is placed inside the basin body, avoiding the gap corrosion problem and prolonging the service life of the battery device.

[0091] 6. The serpentine pipe and the bracket strengthen the bottom strength of the basin structure, improve the bottom profile, and improve the stability of the overall structure.

[0092] Referring to Figures 9 to 14 In other embodiments, the first wall layer 21 is connected with the bottom wall of the strip-shaped recess 1 to form a high-low undulating plate structure, the low part of the plate structure forms the bottom wall of the strip-shaped recess 1, the high part of the plate structure forms the first wall layer 21 of the support part 2, and the second wall layer 22 is attached to the bottom surface of the plate structure.

[0093] The difference between this embodiment and the above-mentioned embodiments is that the first wall layer 21 is connected with the bottom wall of the strip-shaped recess 1 to form a high-low undulating plate structure, the low part of the plate structure forms the bottom wall of the strip-shaped recess 1, the high part of the plate structure forms the first wall layer 21 of the support part 2, and the second wall layer 22 is attached to the bottom surface of the plate structure. The first wall layer 21 is connected with the bottom wall of the strip-shaped recess 1 to form a high-low undulating plate structure, which is beneficial to improve the torsional resistance to enhance the strength. The second wall layer is attached to the bottom surface of the plate structure, which forms a buffer cavity to resist impact and is beneficial to improve the strength of the structure.

[0094] In the technical scheme of this embodiment, the box body 110 includes a strip-shaped recess 1 and a support part 2 located between adjacent two strip-shaped recesses 1, the support part 2 is a double-layer structure composed of a first wall layer 21 and a second wall layer 22, and a buffer cavity 23 is provided between the two layers to buffer external collision or impact, thereby improving the performance of resisting steel ball impact and ensuring the integrity of the battery device when it is impacted. The heat exchange component is arranged at the position of the strip-shaped recess 1 of the box bottom 10, which can effectively alleviate the collision and impact from the outside to protect the battery monomer 120 from being damaged. Therefore, the battery device 100 of this embodiment can effectively improve the impact resistance and safety of the battery device.

[0095] Further, the temperature adjusting part 130 for adjusting the temperature of the battery monomer 120 is arranged inside the box body 110, which reduces the heat conduction path and is beneficial to improve the heat exchange efficiency with the battery monomer 120 and reduce the heat conduction path.

[0096] Further, the temperature adjusting part 130 is arranged in the strip-shaped recessed part 1, and the temperature adjusting part 130 is used to adjust the temperature (for example, the temperature is reduced) of the battery monomer 120 while protecting the battery monomer 120 from being damaged, which is advantageous to reduce the overall height of the battery device, reduce the volume of the battery device 100, and improve the energy density of the battery device.

[0097] In some embodiments, the first wall layer 21 is connected with the bottom wall of the strip-shaped recessed part 1 to form a plate-shaped structure, and the second wall layer 22 includes a strip-shaped part parallel to the strip-shaped recessed part 1, and the cross section of the strip-shaped part is a curved structure arched relative to the plate-shaped structure to form the buffer cavity 23 with the first wall layer 21.

[0098] In some embodiments, the plurality of second wall layers 22 are connected together to form a plate-shaped part, which is advantageous to simplify the installation steps and improve the production efficiency.

[0099] In some embodiments, the box body 110 further includes a side wall 20 connected with the plate-shaped structure, and the plate-shaped structure and the side wall 20 form a basin-shaped structure. The overall basin-shaped structure is advantageous to ensure the sealing property of the battery device and prevent foreign matters or liquid from entering the inside of the battery device 100 to affect the performance of the battery device.

[0100] In some embodiments, the second wall layer 22 is provided with an electrophoretic liquid via hole 25 for flowing the electrophoretic liquid and communicating with the buffer cavity 23. The electrophoretic liquid can flow into or out of the inside of the buffer cavity 23 through the electrophoretic liquid via hole 25, so as to perform electrophoresis on the inner wall surface of the buffer cavity 23 and form an electrophoretic protective layer on the surface of the first wall layer 21 facing the second wall layer 22 and the surface of the second wall layer 22 facing the first wall layer 21, thereby improving the corrosion resistance of the bottom plate assembly.

[0101] In some embodiments, the top surface of the heat exchange part is flush with the top surface of the support part 2, which ensures the firmness of the bonding of the battery cell and avoids the problem of poor bonding caused by inconsistent height.

[0102] In summary, the technical scheme of the embodiment has the following technical effects:

[0103] 1. The external second wall layer 22 forms a reinforcing bracket, and the plurality of second wall layers 22 form a plate-shaped part. In order to ensure good corrosion prevention effect, the opening design is minimized. From the bottom, only the electrophoretic liquid via hole (diameter 8 mm, etc.) is provided, which avoids the entry of mud and water vapor in the external environment into the gap of the sheet metal lap joint and improves the corrosion prevention performance.

[0104] 2. The external reinforcing plate bracket and the basin-shaped structure form the buffer cavity 23 to ensure that no battery cell or other parts are damaged during the bottom ball test. This design improves the safety of the overall structure and ensures the integrity of the battery device when subjected to the impact of the bottom ball.

[0105] According to another aspect of the present application, there is also provided a power consuming device comprising the battery device described above.

[0106] The above is only an exemplary embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that, The enclosure includes a housing (110), battery cells (120) disposed within the housing (110), and a temperature regulating unit (130) disposed between the battery cells (120) and the bottom (10) of the housing (110). The bottom (10) of the housing (110) includes: Multiple strip-shaped recesses (1), two of the strip-shaped recesses (1) are spaced apart, and the temperature regulating part (130) includes a heat exchanger laid in the strip-shaped recesses (1) to regulate the temperature of the battery cell (120); A support portion (2) is formed between two adjacent strip-shaped recesses (1). The support portion includes a first wall layer (21) and a second wall layer (22) arranged and connected to the first wall layer (21) along the thickness direction of the bottom of the box (10). The first wall layer (21) and the second wall layer (22) are at least partially spaced apart to form a buffer cavity (23).

2. The battery device according to claim 1, characterized in that, The first wall layer (21) is connected to the bottom wall of the strip-shaped recess (1) to form a plate-like structure or the first wall layer (21) is integrally formed with the bottom wall of the strip-shaped recess (1). The second wall layer (22) includes a strip-shaped component parallel to the strip-shaped recess (1). The cross-section of the strip-shaped component is a curved structure that arches relative to the plate-like structure, so as to form the buffer cavity (23) with the first wall layer (21).

3. The battery device according to claim 2, characterized in that, The second wall layer (22) includes a wall body (221) that is parallel to and spaced apart from the first wall layer (21) and a connecting portion (222) disposed at the end of the wall body (221) along the width direction of the strip member. The connecting portion (222) is connected to the plate structure, and the strip recess (1) is formed between two adjacent wall bodies (221).

4. The battery device according to claim 3, characterized in that, The second wall layer (22) further includes a transition portion (223) that is connected to the end of the wall body (221) and extends to the connection portion (222), wherein one end of the transition portion (223) away from the wall body (221) is connected to the connection portion (222).

5. The battery device according to claim 2, characterized in that, At least two of the strip-shaped components have the same structure.

6. The battery device according to claim 1, characterized in that, The first wall layer (21) is connected to the bottom wall of the strip-shaped recess (1) to form a plate-like structure with varying heights. The lower part of the plate-like structure forms the bottom wall of the strip-shaped recess (1), and the upper part of the plate-like structure forms the first wall layer (21) of the support part (2). The second wall layer (22) is attached to the bottom surface of the plate-like structure.

7. The battery device according to claim 6, characterized in that, Multiple second wall layers (22) are connected together to form a plate-like component; or The first wall layer (21) is integrally formed with the bottom wall of the strip-shaped recess (1).

8. The battery device according to any one of claims 2 to 7, characterized in that, The box (110) also includes a side wall (20) connected to the plate structure, and the plate structure and the side wall (20) form a basin-shaped structure.

9. The battery device according to claim 1, characterized in that, The second wall layer (22) is provided with an electrophoretic liquid through hole (25) that communicates with the buffer cavity (23) for the flow of electrophoretic liquid.

10. The battery device according to claim 1, characterized in that, The top surface of the heat exchanger is flush with the top surface of the support (2).

11. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 10.

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