Battery device and electric device

Abstract

The utility model provides a battery device and a power utilization device. The battery device comprises a battery monomer; a bracket; the electric control assembly comprises a circuit board and a circuit board shell, the circuit board is electrically connected with the battery monomers, the circuit board shell is connected to the support through a fastener, the circuit board shell comprises a first shell body, a second shell body and a turnover part, one side of the first shell body in the first direction is connected with one side of the second shell body in the first direction through the turnover part, and the first shell body is connected with the second shell body in the second direction; the first shell and the second shell can be close to each other around the folding part, so that the first shell and the second shell are closed to form an accommodating space for accommodating the circuit board; wherein the first shell is provided with a plurality of first through holes, the second shell is provided with a plurality of second through holes, the first through holes correspond to the second through holes in a one-to-one mode, and the fasteners penetrate through the first through holes and the corresponding second through holes and are connected with the support. The reliability of the battery device can be improved.

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] With the rapid development of new energy technologies, battery devices have been widely used in electronic equipment, electric vehicles, electric two-wheeled vehicles, power tools, etc. As the application of battery devices becomes more and more extensive, higher requirements are placed on the reliability of battery devices. Utility Model Content

[0003] The embodiments of the present application provide a battery device and an electrical device to improve the reliability of the battery device and the electrical device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising: a battery cell; a bracket; an electronic control component, comprising a circuit board and a circuit board housing, wherein the circuit board is electrically connected to the battery cell, and the circuit board housing is connected to the bracket via a fastener, and the circuit board housing comprises a first shell, a second shell and a folding portion, wherein one side of the first shell along a first direction and one side of the second shell along the first direction are connected via the folding portion, and the first shell and the second shell can approach each other around the folding portion so that the first shell and the second shell cover each other to form an accommodating space for accommodating the circuit board; wherein the first shell is provided with a plurality of first through holes, and the second shell is provided with a plurality of second through holes, and the plurality of first through holes correspond to the plurality of second through holes one by one, and the fastener passes through the first through holes and the corresponding second through holes and is connected to the bracket.

[0005] A plurality of first through holes are arranged in the first shell, a plurality of second through holes are arranged in the second shell, the plurality of first through holes correspond to the plurality of second through holes one by one, and fasteners pass through the first through holes and the corresponding second through holes and are connected to the bracket, so that the circuit board shell is combined with the bracket to fix the circuit board shell firmly on the bracket, and the first shell and the second shell cover more firmly, even if the circuit board shell is tilted in the folded position, the first shell and the second shell are difficult to separate, which greatly reduces the risk of the circuit board escaping from the circuit board shell, thereby improving the reliability of the battery device.

[0006] In some embodiments, multiple first through holes are arranged in two rows, and the two rows of first through holes are respectively arranged on both sides of the first shell along the first direction; multiple second through holes are arranged in two rows, and the two rows of second through holes are respectively arranged on both sides of the second shell along the first direction.

[0007] Since the two rows of first through holes are respectively arranged on both sides of the first shell along the first direction, and the two rows of second through holes are respectively arranged on both sides of the second shell along the first direction, one row of first through holes and the corresponding second through holes are close to the folding part, so that a fixed point is set at the folding position which is easy to warp, which can effectively suppress the warping of the folding position. In addition, the other row of first through holes and the corresponding second through holes are away from the side of the folding part, and a fixed point is set at the covering position away from the folding position along the first direction, which can effectively suppress the opening of the circuit board shell. Therefore, the covering stability of the circuit board shell can be improved, and the risk of the circuit board escaping from the circuit board shell can be reduced. Therefore, the reliability of the battery device can be improved.

[0008] In some embodiments, the folding portion includes a plurality of bending segments.

[0009] Multiple bending sections can increase the size of the folding portion, so that when the first shell and the second shell are close to each other and covered, the degree of tilting of the folding position can be reduced, so that the circuit board shell is fixed more securely, and it is also beneficial to align the first through hole and the second through hole with the bracket, thereby improving the convenience of installation. In addition, multiple bending sections are also beneficial to reduce space occupancy and improve the space utilization rate of the battery device.

[0010] In some embodiments, the folded portion is provided with a weakened portion.

[0011] By providing the weakening portion on the folding portion, when the first shell and the second shell are close to each other around the folding portion and covered, the folding portion can be bent more easily, thereby reducing the risk of the covering position opening.

[0012] In some embodiments, the folding portion includes a first bending section, a second bending section and a connecting section, the connecting section connects the first bending section and the second bending section, one end of the first bending section away from the connecting section is connected to the first shell, and one end of the second bending section away from the connecting section is connected to the second shell; wherein the weakening portion is arranged on the connecting section.

[0013] By setting the weakening portion in the connecting section between the first bending section and the second bending section, when the first shell and the second shell are close to each other around the folding portion, the folding portion can be smoothly bent in the connecting section, further alleviating the degree of warping at the folding position, thereby improving the connection reliability.

[0014] In some embodiments, the first shell includes a first shell body and a first flange portion, and the first flange portion is arranged on the outer peripheral side of the first shell body; the second shell includes a second shell body and a second flange portion, and the second flange portion is arranged on the outer peripheral side of the second shell body; the first through hole is arranged in the first flange portion, and the second through hole is arranged in the second flange portion.

[0015] By setting the first through hole on the first flange part and the second through hole on the second flange part, the first shell and the second shell can be conveniently covered and fixed, and the covering is tighter.

[0016] In some embodiments, a first protrusion is formed on the first flange portion, the first protrusion is located on the side of the first shell away from the folding portion along the first direction, the first protrusion extends along a second direction, and the second direction is perpendicular to the first direction; a first groove is formed on the second flange portion, the first protrusion is embedded in the first groove and has an interference fit with the first groove.

[0017] A first protrusion is formed by the first flange portion, and the first protrusion is located on the side of the first shell away from the folding portion along the first direction. A first slot is formed on the second flange portion, and the first protrusion is embedded in the first slot and has an interference fit with the first slot, which can reduce the gap at the covering position when the first shell and the second shell are covered, and can better protect the circuit board.

[0018] In some embodiments, the first flange portion is formed with at least two second protrusions, and the second protrusions are located on the side of the first shell away from the folding portion along the first direction; the second flange portion is formed with a plurality of second grooves corresponding to the positions of the plurality of second protrusions, and the second protrusions are embedded in the corresponding second grooves and are interference fit with the second grooves; wherein, along the second direction, the first protrusion is located between at least two of the second protrusions.

[0019] At least two second protrusions are formed by the first flange portion, and the second protrusions are located on the side of the first shell away from the folding portion along the first direction. The second flange portion is formed with multiple second slots corresponding to the positions of the multiple second protrusions respectively. Along the second direction, the first protrusion is located between at least two second protrusions, which can also reduce the risk of warping at the corners when the first shell and the second shell are covered, improve the connection reliability, and thus better protect the circuit board.

[0020] In some embodiments, the first shell body includes a bottom wall and a first side wall, the first side wall is connected to the four sides of the bottom wall, and the bottom wall and the first side wall form a first groove; the second shell body includes a top wall and a second side wall, the top wall and the bottom wall are arranged opposite to each other along a third direction, the second side wall is connected to the four sides of the top wall, the top wall and the second side wall form a second groove, the first groove and the second groove together form the accommodating space, and the third direction is perpendicular to the first direction; a plurality of first reinforcing ribs are formed on the second side wall, and each of the first reinforcing ribs extends along the third direction; and / or a plurality of second reinforcing ribs and a plurality of third reinforcing ribs are formed on the top wall, and the second reinforcing ribs intersect with the third reinforcing ribs.

[0021] A plurality of first reinforcing ribs are formed on the second side wall, each of which extends along the third direction, so that the strength of the second side wall can be improved; a plurality of second reinforcing ribs and a plurality of third reinforcing ribs are formed on the top wall, and the second reinforcing ribs intersect with the third reinforcing ribs, so that the strength of the top wall can be improved. Thus, the overall strength of the second housing can be improved, so that the impact force along the third direction can be resisted, so as to better protect the circuit board.

[0022] In some embodiments, a plurality of fourth reinforcing ribs are formed on the first side wall, and each of the fourth reinforcing ribs extends along the third direction; and / or a plurality of fifth reinforcing ribs and a plurality of sixth reinforcing ribs are formed on the bottom wall, and the fifth reinforcing ribs intersect with the sixth reinforcing ribs.

[0023] A plurality of fourth reinforcing ribs are formed on the first side wall, each of which extends along the third direction, so that the strength of the first side wall can be improved; a plurality of fifth reinforcing ribs and a plurality of sixth reinforcing ribs are formed on the bottom wall, and the fifth reinforcing ribs intersect with the sixth reinforcing ribs, so that the strength of the bottom wall can be improved. Thus, the overall strength of the first housing can be improved, so that the impact force along the third direction can be resisted, so as to better protect the circuit board.

[0024] In some embodiments, the bracket includes a protection plate, and the protection plate is arranged opposite to the bottom wall along the third direction.

[0025] By arranging the protection plate and the bottom wall relative to each other along the third direction, the bottom impact can be resisted and the bottom wall is protected.

[0026] In some embodiments, the bracket is a sheet metal part.

[0027] The sheet metal can increase the strength of the bracket, thereby improving the impact resistance to better protect the circuit board housing.

[0028] In some embodiments, the bracket includes a plurality of bosses, the first through holes and the second through holes correspond to the bosses one by one, and the fasteners are connected to the bosses.

[0029] The bracket includes a plurality of bosses, and the fasteners are connected to the bosses, so that the circuit board housing can be firmly fixed to the bracket, thereby improving the connection reliability. In the embodiment where the folding structure includes multiple bending sections, since the multiple bending section structure can reduce the degree of warping at the folding position, it is convenient to position the bosses with the corresponding first through holes and second through holes, thereby improving the positioning accuracy and installation efficiency.

[0030] In some embodiments, an antistatic layer is disposed on the surface of the circuit board housing.

[0031] By arranging an antistatic layer on the surface of the circuit board shell, the antistatic ability of the circuit board shell can be improved, thereby better protecting the circuit board.

[0032] In some embodiments, the circuit board housing is a blister.

[0033] Blister parts can make the circuit board shell thinner, thus more lightweight, and can be formed faster, thus improving production efficiency.

[0034] In a second aspect, an embodiment of the present application provides an electrical device, comprising a battery device according to any of the above embodiments.

[0035] Since the circuit board housing in the battery device can reliably protect the circuit board, thereby improving the reliability of the battery device, the power consumption reliability of the power consumption device including the battery device is also improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope.

[0037] Figure 1 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0038] Figure 2 An exploded schematic diagram of a box provided in some embodiments of the present application;

[0039] Figure 3 An exploded schematic diagram of a battery cell provided in some embodiments of the present application;

[0040] Figure 4 A schematic diagram of a structure in which a circuit board housing is fixed to a bracket provided in some embodiments of the present application;

[0041] Figure 5 A schematic structural diagram of another perspective of a circuit board housing being fixed to a bracket provided in some embodiments of the present application;

[0042] Figure 6 A schematic diagram of the structure of a circuit board housing in a closed state provided in some embodiments of the present application;

[0043] Figure 7 A schematic diagram of the structure of a circuit board housing in an unfolded state provided in some embodiments of the present application;

[0044] Figure 8 for Figure 7 A magnified schematic diagram of the middle A position;

[0045] Fig. 9 A schematic diagram of a part of the structure of a circuit board housing in an unfolded state provided in some embodiments of the present application, wherein the specific structure of the folding portion is shown;

[0046] Fig.10 for Figure 6 A magnified schematic diagram of position B in the middle;

[0047] Fig.11 A partial structural schematic diagram of a circuit board housing is provided for some embodiments of the present application, wherein the specific structure of the first shell is shown.

[0048] icon:

[0049] 1000-Vehicles;

[0050] 100-battery device; 200-controller; 300-motor;

[0051] 10-box body; 11-first box body; 12-second box body;

[0052] 20 - battery cell; 21 - battery cell housing; 22 - electrode assembly; 23 - electrode terminal; 211 - housing; 212 - end cover; 221 - main body; 222 - pole ear;

[0053] 30- bracket; 31- protection plate; 32- boss; 33- leg;

[0054] 40-electric control component; 41-circuit board housing; 411-first housing; 4111-first housing body; 4111a-bottom wall; 4111b-first side wall; 4111c-fourth reinforcing rib; 4111d-fifth reinforcing rib; 4111e-sixth reinforcing rib; 4112-first flange; 416-first protrusion; 417-second protrusion; 412-second housing; 4121-second housing body; 4121a-top wall; 4121b-second side wall; 4121c-first reinforcing rib; 4121d-second reinforcing rib; 4121e-third reinforcing rib; 4122-second flange; 413-folding portion; 413a-first bending section; 413b-second bending section; 413c-connecting section; 415-weakening portion; 4141-first through hole; 4142-second through hole;

[0055] 50-Fasteners. DETAILED DESCRIPTION

[0056] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0057] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in this application and in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in this application are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in this application are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0058] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places 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.

[0059] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" 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 direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0060] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. 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 application generally indicates that the associated objects before and after are in an "or" relationship.

[0061] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0062] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0063] The battery cell 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.

[0064] The battery cell may include a battery cell housing. The battery cell housing is used to encapsulate components such as electrode assemblies and electrolytes. The battery cell housing may be a steel shell, an aluminum shell, a plastic shell (such as polypropylene), a composite metal shell (such as a copper-aluminum composite shell) or an aluminum-plastic film.

[0065] As an example, the battery cell may be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell of other shapes. The prismatic battery cell includes but is not limited to a square-shell battery cell, a blade-shaped battery cell, a polygonal battery, such as a hexagonal battery, etc.

[0066] The 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 may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0067] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module.

[0068] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0069] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0070] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0071] As an example, the box body may include a first box body and a second box body. The first box body and the second box body are buckled together to form a closed space inside the box body to accommodate the battery monomer assembly. The closed here means covered or closed, which can be sealed or unsealed.

[0072] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0073] As an example, the box body can be used as a part of the chassis structure of the vehicle. For example, the top cover of the box body can become at least a part of the floor of the vehicle, or the frame of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0074] In some embodiments, the battery device refers to an energy storage device, which includes a box body, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0075] Battery devices have outstanding advantages such as high energy density, low environmental pollution, high power density, long service life, wide adaptability, and low self-discharge coefficient. They are an important part of the development of new energy today. The development of battery technology must consider many factors at the same time, such as performance parameters such as energy density, cycle life, discharge capacity, and charge and discharge rate. In addition, the reliability of the battery device must also be considered.

[0076] The battery device includes a circuit board, which is usually installed in a circuit board housing. The circuit board housing includes a first shell and a second shell. The first shell and the second shell cover each other to form a housing space for accommodating the circuit board, so as to protect the circuit board, for example, against impact, corrosion, and short circuit. Therefore, the reliability of the covering of the first shell and the second shell in the circuit board housing is particularly important.

[0077] Taking the Cell Supervision Circuit (CSC) as an example, the battery monitoring unit is used to collect the status information of the battery cells and transmit it to the battery management unit to ensure the stable and efficient operation of the battery device. The circuit board housing in the battery monitoring unit adopts a folding integrated first shell and second shell, and the first shell and the second shell are covered around the folding position to improve the assembly efficiency. However, when the folding integrated structure is covered, due to the presence of a certain tension at the folding position, the circuit board housing will be warped at the folding position and the covering position will be unstable. When vibrated or dropped, the first shell and the second shell are easily separated, resulting in the risk of the circuit board falling out of the circuit board housing and being damaged, which ultimately leads to poor reliability of the battery device.

[0078] In this regard, an embodiment of the present application provides a battery device, including: a battery cell; a bracket; an electronic control component, including a circuit board and a circuit board housing, the circuit board is electrically connected to the battery cell, the circuit board housing is connected to the bracket through a fastener, the circuit board housing includes a first shell, a second shell and a folding portion, one side of the first shell along a first direction and one side of the second shell along the first direction are connected through the folding portion, the first shell and the second shell can be close to each other around the folding portion so that the first shell and the second shell cover to form an accommodating space for accommodating the circuit board; wherein the first shell is provided with a plurality of first through holes, the second shell is provided with a plurality of second through holes, the plurality of first through holes correspond to the plurality of second through holes one by one, the fastener passes through the first through holes and the corresponding second through holes and is connected to the bracket.

[0079] A plurality of first through holes are arranged in the first shell, a plurality of second through holes are arranged in the second shell, the plurality of first through holes correspond to the plurality of second through holes one by one, and the fasteners pass through the first through holes and the corresponding second through holes and are connected to the bracket, so that the circuit board shell is combined with the bracket, thereby the circuit board shell is firmly fixed to the bracket, and the first shell and the second shell are more firmly covered, and even if the circuit board shell is tilted in the folded position, the first shell and the second shell are difficult to separate, thereby greatly reducing the risk of the circuit board escaping from the circuit board shell, thereby improving the reliability of the battery device.

[0080] The battery device 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 to improve the reliability of the battery device.

[0081] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0082] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electrical device in some embodiments of the present application.

[0083] Reference Figure 1The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle. 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. The battery device 100 may be provided at the bottom of the vehicle 1000, at the head of the vehicle 1000, or at the 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 or a power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to power the motor 300, for example, to meet the power requirements for starting, navigating and driving the vehicle 1000.

[0084] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source or a usage 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.

[0085] Reference Figure 2 and Figure 3 The box body 10 is used to provide an assembly space for the battery cell 20, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cell 20. The first box body 11 may be a plate-like structure, the second box body 12 may be a hollow structure with one end open, and the second box body 12 covers the open side of the first box body 11, and the first box body 11 and the second box body 12 may be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12.

[0086] Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, for example, a cylinder, a cuboid or a cube. Figure 2 In the embodiment, the box body 10 is in the shape of a rectangular parallelepiped.

[0087] In the battery device 100, a plurality of battery cells 20 are arranged in the box 10, and the plurality of battery cells 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the plurality of battery cells 20 are both connected in series and in parallel. The plurality of battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by the plurality of battery cells 20 is accommodated in the box 10; of course, the battery device 100 can also be a battery module formed by first connecting the plurality of battery cells 20 in series, in parallel, or in a mixed connection, and then the plurality of battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and then the whole is accommodated in the box 10.

[0088] In some embodiments, the battery device 100 may further include other structures. For example, the battery device 100 may further include a busbar component, which is used to connect the plurality of battery cells 20 to achieve electrical connection between the plurality of battery cells 20 .

[0089] Each battery cell 20 may be a secondary battery or a primary battery; it may also be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto. The battery cell 20 may be in a rectangular parallelepiped, a cylinder, a prism or other shapes. For example, Figure 3 In the figure, the battery cell 20 is a rectangular parallelepiped structure.

[0090] As an example, see Figure 3 The battery cell 20 includes a battery cell housing 21 and an electrode assembly 22 disposed in the battery cell housing 21 .

[0091] The battery cell housing 21 can also be used to contain electrolytes, such as electrolytes. The battery cell housing 21 can be in various structural forms, such as a cylinder or a cuboid. Similarly, the battery cell housing 21 can be made of various materials, such as copper, iron, aluminum, steel or aluminum alloy.

[0092] Optionally, the battery cell housing 21 may include a battery shell 211 and an end cover 212, wherein a accommodating cavity is formed inside the battery shell 211, the accommodating cavity is used to accommodate the electrode assembly 22, and the accommodating cavity has an opening, that is, the battery shell 211 is a hollow structure with an opening formed at one end, and the end cover 212 covers the opening of the battery shell 211 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte.

[0093] The battery housing 211 can be in various shapes, such as a cylinder, a cuboid, or a prismatic structure. The shape of the battery housing 211 can be determined according to the specific shape of the electrode assembly 22. For example, if the electrode assembly 22 is a cylindrical structure, a battery housing 211 with a cylindrical structure can be selected; if the electrode assembly 22 is a cuboid structure, a cuboid structure can be selected. Of course, the structure of the end cap 212 can also be various, for example, the end cap 212 is a plate-like structure or a hollow structure with one end open. For example, in Figure 3 In the embodiment, the battery housing 211 is a rectangular parallelepiped structure.

[0094] Of course, it is understandable that the battery cell housing 21 is not limited to the above-mentioned structure, and the battery cell housing 21 may also be other structures. For example, the battery cell housing 21 may include a battery shell 211 and two end covers 212. The battery shell 211 is a hollow structure with openings formed on two opposite sides. One end cover 212 corresponds to an opening of the battery shell 211 and forms a sealed connection to form a sealed space for accommodating the electrode assembly 22 and the electrolyte. That is, the battery shell 211 has openings formed on two opposite sides, and the two end covers 212 are respectively covered on two sides of the battery shell 211 to close the corresponding openings.

[0095] It should be noted that the electrode assembly 22 is the component where electrochemical reactions occur in the battery cell 20, and the structure of the electrode assembly 22 can be of various types. For example, the electrode assembly 22 can be a wound structure formed by winding a positive electrode sheet, an isolation member, and a negative electrode sheet, or it can be a stacked structure formed by stacking a positive electrode sheet, an isolation member, and a negative electrode sheet.

[0096] Exemplarily, the isolation member is an isolation membrane, and a main material of the isolation membrane may be selected from at least one of glass fiber, non-woven fabric, polyethylene, polypropylene and polyvinylidene fluoride.

[0097] The electrode assembly 22 includes a main body 221 and a tab 222. The main body 221 is a main component of the electrode assembly 22 for electrochemical reaction in the battery cell 20. Figure 3 In the embodiment, the tab 222 is connected to one end of the main body 221 close to the end cap 212, so that the tab 222 is connected to the electrode terminal 23. The tab 222 can be directly connected to the electrode terminal 23, or can be connected through a transition component.

[0098] Optionally, the number of electrode assemblies 22 contained in the battery cell housing 21 may be one or more. Figure 3 In the embodiment, the battery cell shell 21 of the battery cell 20 is provided with a plurality of electrode assemblies 22, and the plurality of electrode assemblies 22 are stacked. When a plurality of electrode assemblies 22 are provided in the battery cell shell 21 of the battery cell 20, the number of the electrode assemblies 22 may be two, three, four, five or six, etc.

[0099] The electrode terminal 23 serves to electrically connect the electrode assembly 22 to serve as an output terminal or an input terminal of the battery cell 20 , thereby being able to output or input electrical energy of the battery cell 20 .

[0100] Exemplarily, the electrode terminal 23 may be made of a variety of materials. For example, the electrode terminal 23 may be made of copper, iron, aluminum, steel, or aluminum alloy.

[0101] Among them, Figure 3In the figure, the battery cell 20 includes two electrode terminals 23, and correspondingly, each electrode assembly 22 has two pole ears 222, and the polarities of the two pole ears 222 are opposite, that is, the two pole ears 222 are respectively the positive electrode and negative electrode of the input or output electrode assembly 22, and the two electrode terminals 23 are respectively electrically connected to the two pole ears 222 of the electrode assembly 22 to realize the input or output of the positive and negative electrodes of the battery cell 20.

[0102] The electrode terminal 23 may be mounted on the battery cell housing 21 in various structures. Figure 3 In the embodiment, the two electrode terminals 23 are mounted on the end cap 212. Of course, the structure of the battery cell 20 is not limited thereto. In other embodiments, the two electrode terminals 23 may be mounted on the battery housing 211 of the battery cell housing 21. Similarly, one electrode terminal 23 may be mounted on the battery housing 211 of the battery cell housing 21, and the other electrode terminal 23 may be mounted on the end cap 212 of the battery cell housing 21.

[0103] Refer to the following Figures 2 to 11 , the embodiments of the present application are described in detail.

[0104] In the figure, the direction of arrow X is the first direction X, the direction of arrow Y is the second direction Y, and the direction of arrow Z is the third direction Z. The first direction X, the second direction Y and the third direction Z may be perpendicular to each other.

[0105] The embodiment of the present application provides a battery device 100, including: a battery cell 20; a bracket 30; an electronic control component 40, including a circuit board (not shown in the figure) and a circuit board housing 41, the circuit board is electrically connected to the battery cell 20, the circuit board housing 41 is connected to the bracket 30 through a fastener 50, the circuit board housing 41 includes a first shell 411, a second shell 412 and a folding portion 413, one side of the first shell 411 along the first direction X and one side of the second shell 412 along the first direction X are connected through the folding portion 413, the first shell 411 and the second shell 412 can be close to each other around the folding portion 413, so that the first shell 411 and the second shell 412 cover to form an accommodating space for accommodating the circuit board; wherein the first shell 411 is provided with a plurality of first through holes 4141, the second shell 412 is provided with a plurality of second through holes 4142, the plurality of first through holes 4141 correspond to the plurality of second through holes 4142 one by one, and the fastener 50 passes through the first through holes 4141 and the corresponding second through holes 4142 and is connected to the bracket 30.

[0106] The battery cell 20 is a source of electrical energy required for the electrochemical reaction. The battery cell 20 stores and releases energy through chemical reactions, thereby providing power to external devices. The battery cell 20 can have a variety of shapes, such as cylindrical, square, prismatic, etc. The battery cell 20 can also be a soft-pack battery. The number of battery cells 20 can be one or more. When there are multiple battery cells 20, multiple battery cells 20 can be connected in parallel or in series. This application does not impose any special restrictions on the shape or type of the battery cell 20.

[0107] The bracket 30 is used to support and fix the electronic control component 40 to improve the stability of the electronic control component 40 .

[0108] The electronic control component 40 may be a battery supervision circuit (CSC), which is used to collect status information of the battery cells 20 and transmit it to a battery management system (BMS) to ensure stable and efficient operation of the battery device 100.

[0109] The electric control assembly 40 includes a circuit board and a circuit board housing 41. The circuit board is disposed in the circuit board housing 41 and is electrically connected to the battery cell 20. The circuit board is the component in the electric control assembly 40 that is mainly responsible for monitoring the status of the battery cell 20. The circuit board may be integrated with a battery voltage detection circuit, a current detection circuit, a temperature detection circuit, a communication module, etc. A plurality of connectors may also be integrated on the circuit board, such as a power supply connector, a communication connector, etc.

[0110] The circuit board housing 41 includes a first shell 411, a second shell 412 and a folding portion 413. The first shell 411 on one side along the first direction X and the second shell 412 on one side along the first direction X are connected through the folding portion 413. The first shell 411 and the second shell 412 can approach each other around the folding portion 413 so that the first shell 411 and the second shell 412 cover each other to form a accommodating space for accommodating the circuit board.

[0111] The edges of the first shell 411 and the second shell 412 located on the same side along the first direction X are connected by a folding portion 413. The first shell 411 and the second shell 412 can be closed together or opened away from each other around the folding portion 413. During the closing or opening of the first shell 411 and the second shell 412, the folding portion 413 is bent. The first shell 411, the second shell 412 and the folding portion 413 can be integrally formed, for example, by vacuum forming.

[0112] The first housing 411 is provided with a plurality of first through holes 4141, and the second housing 412 is provided with a plurality of second through holes 4142. The plurality of first through holes 4141 correspond to the plurality of second through holes 4142 one by one. The fastener 50 passes through the first through holes 4141 and the corresponding second through holes 4142 and is connected to the bracket 30. The first through hole 4141 passes through the first housing 411 along the thickness direction of the first housing 411. The second through hole 4142 passes through the second housing 412 along the thickness direction of the second housing 412. One first through hole 4141 corresponds to one second through hole 4142. A fastener 50 is passed through each first through hole 4141 and the corresponding second through hole 4142, and the fastener 50 is connected to the bracket 30, so that the circuit board housing 41 is fixed to the bracket 30 by the fastener 50.

[0113] The shape of the circuit board housing 41 can be adapted to the shape of the circuit board therein. Figure 6 A rectangular circuit board housing 41 is shown. The first direction X may be the width direction of the circuit board housing 41 , the second direction Y may be the length direction of the circuit board housing 41 , and the third direction Z may be the height direction of the circuit board housing 41 .

[0114] A plurality of first through holes 4141 are provided in the first shell 411, and a plurality of second through holes 4142 are provided in the second shell 412. The plurality of first through holes 4141 correspond to the plurality of second through holes 4142 one by one. The fastener 50 passes through the first through holes 4141 and the corresponding second through holes 4142 and is connected to the bracket 30, so that the circuit board shell 41 is combined with the bracket 30 to securely fix the circuit board shell 41 on the bracket 30, and the first shell 411 and the second shell 412 are more firmly covered. Even if the circuit board shell 41 is tilted in the folded position, the first shell 411 and the second shell 412 are difficult to separate, thereby greatly reducing the risk of the circuit board escaping from the circuit board shell 41. Thus, the reliability of the battery device 100 can be improved.

[0115] In some embodiments, multiple first through holes 4141 are arranged in two rows, and the two rows of first through holes 4141 are respectively arranged on both sides of the first shell 411 along the first direction X; multiple second through holes 4142 are arranged in two rows, and the two rows of second through holes 4142 are respectively arranged on both sides of the second shell 412 along the first direction X.

[0116] The number of the first through holes 4141 in each row may be multiple, and the multiple first through holes 4141 in each row may be distributed at intervals along the second direction Y. The numbers of the first through holes 4141 in two rows may be the same or different.

[0117] The number of the second through holes 4142 in each row may be multiple, and the multiple second through holes 4142 in each row may be distributed at intervals along the second direction Y. The numbers of the second through holes 4142 in two rows may be the same or different.

[0118] The shapes of the first through hole 4141 and the second through hole 4142 can be round holes, square holes, etc. Figure 7 It is shown that the first through hole 4141 and the second through hole 4142 are both round holes.

[0119] As an example, see Figure 7 , the two rows of first through holes 4141 are respectively arranged at the edge positions of both sides of the first shell 411 along the first direction X, one row of the two rows of first through holes 4141 is arranged at the edge of the first shell 411 away from the folding portion 413 along the first direction X, and at least two first through holes 4141 are arranged at the edge positions of both sides of the first shell 411 along the second direction Y; the other row of the two rows of first through holes 4141 is arranged at the edge of the first shell 411 close to the folding portion 413 along the first direction X, and at least two first through holes 4141 are arranged at the edge positions of both sides of the first shell 411 along the second direction Y. That is, the first through holes 4141 are arranged at the four corners of the first shell 411.

[0120] The two rows of second through holes 4142 are respectively arranged at the edge positions of both sides of the second shell 412 along the first direction X, one row of the two rows of second through holes 4142 is arranged at the edge of the second shell 412 away from the folding portion 413 along the first direction X, and at least two second through holes 4142 are arranged at the edge positions of both sides of the second shell 412 along the second direction Y; the other row of the two rows of second through holes 4142 is arranged at the edge of the second shell 412 close to the folding portion 413 along the first direction X, and at least two second through holes 4142 are arranged at the edge positions of both sides of the second shell 412 along the second direction Y. That is, the second through holes 4142 are arranged at the four corners of the second shell 412.

[0121] Since the two rows of first through holes 4141 are respectively arranged on both sides of the first shell 411 along the first direction X, and the two rows of second through holes 4142 are respectively arranged on both sides of the second shell 412 along the first direction X, one row of the first through holes 4141 and the corresponding second through holes 4142 are close to the folding portion 413, so that a locking point is set at the folding position that is easy to tilt, which can effectively prevent the folding position from tilting. In addition, the other row of the first through holes 4141 and the corresponding second through holes 4142 are far away from the folding portion 413, that is, a locking point is set at the covering position far away from the folding position along the first direction X, which can effectively prevent the circuit board shell 41 from opening. Therefore, the covering stability of the circuit board shell 41 can be improved, and the risk of the circuit board escaping from the circuit board shell 41 can be reduced. Therefore, the reliability of the battery device 100 can be improved.

[0122] In some embodiments, the folding portion 413 includes a plurality of bending segments.

[0123] The shapes formed by the multiple bending segments can be various, such as wave shape, etc. When the multiple bending segments form a wave shape, the shape of each wave segment can be the same or different, and the crest and trough of each wave segment can be the same or different. Fig. 9 , it is shown that the folded portion 413 of the circuit board housing 41 is in a "bow"-shaped structure in the unfolded state (flattened state).

[0124] The multiple bending sections can extend the size of the folding portion 413, so that when the first shell 411 and the second shell 412 are close to each other around the folding portion 413 and covered, the degree of warping of the folding position close to the folding portion 413 can be reduced, so that the circuit board shell 41 is fixed more securely, and it is also beneficial to align the first through hole 4141 and the second through hole 4142 with the bracket 30, thereby improving the installation convenience. In addition, compared with simply extending the straight length of the folding portion, the multiple bending sections are also beneficial to reduce space occupancy and improve the space utilization rate of the battery device 100.

[0125] In some embodiments, the folded portion 413 is provided with a weakened portion 415 .

[0126] The weakened portion 415 can be understood as the folded portion 413 having a lower strength at the weakened portion 415 than at other positions, so that when the first shell 411 and the second shell 412 are close to each other and covered around the folded portion 413 , the folded portion 413 can be smoothly bent at the weakened portion 415 .

[0127] A local position on the folded portion 413 may be thinned to form a weakened portion 415 , so that the strength of the weakened portion 415 is lower than the strength of other positions on the folded portion 413 .

[0128] A notch may be provided on the folded portion 413 to form a weakened portion 415 , so that the strength of the weakened portion 415 is lower than the strength of other positions of the folded portion 413 .

[0129] A through groove penetrating the folded portion 413 in the thickness direction may also be provided to form a weakened portion 415 , so that the strength of the weakened portion 415 is lower than the strength of other positions of the folded portion 413 .

[0130] As an example, see Figure 7 and Figure 8 A plurality of through grooves penetrating the folded portion 413 in the thickness direction are provided to form a weakened portion 415 , and the through grooves can extend along the second direction Y.

[0131] By providing a weakening portion 415 on the folding portion 413, when the first shell 411 and the second shell 412 are close to each other and covered around the folding portion 413, the folding portion 413 can be bent more easily at the weakening portion 415, reducing the stress of the folding portion 413, thereby reducing the risk of the covering position opening.

[0132] In some embodiments, reference is made to Figure 8 , Fig. 9 and Fig.10 The folding portion 413 includes a first bending segment 413a, a second bending segment 413b and a connecting segment 413c, the connecting segment 413c connects the first bending segment 413a and the second bending segment 413b, the end of the first bending segment 413a away from the connecting segment 413c is connected to the first shell 411, and the end of the second bending segment 413b away from the connecting segment 413c is connected to the second shell 412; wherein the weakening portion 415 is arranged on the connecting segment 413c.

[0133] As an example, the first bending segment 413a, the second bending segment 413b and the connecting segment 413c can be connected end to end and formed as one piece, the end of the first bending segment 413a away from the connecting segment 413c can be connected to the edge of the first shell 411 on one side along the first direction X, the end of the second bending segment 413b away from the connecting segment 413c can be connected to the edge of the second shell 412 on one side along the first direction X, and the connecting segment 413c is connected between the first bending segment 413a and the second bending segment 413b.

[0134] By setting the weakening portion 415 in the connecting section 413c between the first bending section 413a and the second bending section 413b, when the first shell 411 and the second shell 412 are close to each other around the folding portion 413, the folding portion 413 can be smoothly bent at the connecting section 413c, further alleviating the degree of warping of the folding position close to the folding portion 413, thereby improving the connection reliability.

[0135] In some embodiments, reference Figure 7 The first shell 411 includes a first shell body 4111 and a first flange portion 4112, and the first flange portion 4112 is arranged on the outer peripheral side of the first shell body 4111; the second shell 412 includes a second shell body 4121 and a second flange portion 4122, and the second flange portion 4122 is arranged on the outer peripheral side of the second shell body 4121; the first through hole 4141 is arranged in the first flange portion 4112, and the second through hole 4142 is arranged in the second flange portion 4122.

[0136] The first flange portion 4112 may be formed to protrude outward from the periphery of the first shell body 4111. The second flange portion 4122 may be formed to protrude outward from the periphery of the second shell body 4121.

[0137] When the first housing 411 and the second housing 412 are closed, the first flange portion 4112 and the second flange portion 4122 are buckled together, so that the first housing body 4111 and the second housing body 4121 form a closed space for the circuit board.

[0138] The first through hole 4141 is provided in the first flange portion 4112, and the second through hole 4142 is provided in the second flange portion 4122, which facilitates the closing and fixing of the first housing 411 and the second housing 412 and makes the closing tighter, so as to better protect the circuit board.

[0139] In some embodiments, referring to Fig.11 , the first flange portion 4112 is formed with a first protrusion 416. The first protrusion 416 is located on the side of the first housing 411 away from the folding portion 413 along the first direction X. The first protrusion 416 extends along the second direction Y, and the second direction Y is perpendicular to the first direction X; the second flange portion 4122 is formed with a first card slot (not shown in the figure). The first protrusion 416 is embedded in the first card slot and is in interference fit with the first card slot.

[0140] There may be one or more first protrusions 416. Fig.11 Two elongated first protrusions 416 arranged at intervals are shown in . As an example, the cross-sectional shape of the first protrusion 416 may be in a "ji" shape.

[0141] The second flange portion 4122 is formed with a first card slot corresponding to the first protrusion 416. When the first housing 411 and the second housing 412 are closed, the first protrusion 416 is embedded in the first card slot and is in interference fit with the first card slot. The first protrusion 416 and the first card slot can be in interference fit by means of thermal riveting and other methods.

[0142] Since the first flange portion 4112 is formed with a first protrusion 416, the first protrusion 416 is located on the side of the first housing 411 away from the folding portion 413 along the first direction X, and the second flange portion 4122 is formed with a first card slot (not shown in the figure). The first protrusion 416 is embedded in the first card slot and is in interference fit with the first card slot, which can reduce the gap when the first housing 411 and the second housing 412 are closed, so as to better protect the circuit board.

[0143] In some embodiments, referring to Fig.11 , the first flange portion 4112 is formed with at least two second protrusions 417. The second protrusions 417 are located on the side of the first housing 411 away from the folding portion 413 along the first direction X; the second flange portion 4122 is formed with a plurality of second card slots (not shown in the figure) corresponding to the positions of the plurality of second protrusions 417 respectively. The second protrusions 417 are embedded in the corresponding second card slots and are in interference fit with the second card slots; wherein, along the second direction Y, the first protrusion 416 is located between at least two second protrusions 417.

[0144] As an example, see Fig.11 Two second protrusions 417 are provided, and the two second protrusions 417 are respectively located at the corner positions of the first shell 411 away from the folding portion 413 along the first direction X. The second protrusion 417 can be cylindrical.

[0145] The second flange 4122 is formed with a plurality of second slots corresponding to the positions of the plurality of second protrusions 417. When the first housing 411 and the second housing 412 are covered, the second protrusions 417 are inserted into the corresponding second slots and are interference-fitted with the second slots. The second protrusions 417 and the second slots can be interference-fitted by means of hot riveting or the like.

[0146] At least two second protrusions 417 are formed by the first flange portion 4112, and the second protrusions 417 are located on the side of the first shell 411 away from the folding portion 413 along the first direction X. The second flange portion 4122 is formed with multiple second slots corresponding to the positions of the multiple second protrusions 417 respectively. Along the second direction Y, the first protrusion 416 is located between at least two second protrusions 417, which can also reduce the risk of the corners warping when the first shell 411 and the second shell 412 are covered, thereby improving the connection reliability and better protecting the circuit board.

[0147] In some embodiments, reference Figure 4 , Figure 5 and Figure 6 The first shell body 4111 includes a bottom wall 4111a and a first side wall 4111b, the first side wall 4111b is connected to the periphery of the bottom wall 4111a, and the bottom wall 4111a and the first side wall 4111b form a first groove; the second shell body 4121 includes a top wall 4121a and a second side wall 4121b, the top wall 4121a and the bottom wall 4111a are arranged opposite to each other along the third direction Z, the second side wall 4121b is connected to the periphery of the top wall 4121a, and the top wall 4121a and the second side wall 4121b are connected to the periphery of the top wall 4121a. The side wall 4121b forms a second groove, and the first groove and the second groove together form an accommodating space for accommodating a circuit board, and the third direction Z is perpendicular to the first direction X; a plurality of first reinforcing ribs 4121c are formed on the second side wall 4121b, and each first reinforcing rib 4121c extends along the third direction Z; and / or a plurality of second reinforcing ribs 4121d and a plurality of third reinforcing ribs 4121e are formed on the top wall 4121a, and the second reinforcing ribs 4121d intersect with the third reinforcing ribs 4121e.

[0148] The bottom wall 4111a and the first side wall 4111b of the first shell body 4111 can be integrally formed, such as by injection molding. The top wall 4121a and the second side wall 4121b of the second shell body 4121 can be integrally formed, such as by injection molding.

[0149] A plurality of first reinforcing ribs 4121c are formed on the second side wall 4121b, and the first reinforcing ribs 4121c may be concave ribs on the outer surface of the second side wall 4121b. The plurality of first reinforcing ribs 4121c are distributed along the circumference of the second side wall 4121b. The first reinforcing ribs 4121c extend along the third direction Z, thereby improving the strength of the second side wall 4121b.

[0150] A plurality of second reinforcing ribs 4121d and a plurality of third reinforcing ribs 4121e are formed on the top wall 4121a, and the second reinforcing ribs 4121d intersect with the third reinforcing ribs 4121e, thereby improving the strength of the top wall 4121a.

[0151] The second reinforcing rib 4121d and the third reinforcing rib 4121e may intersect vertically or obliquely. The second reinforcing rib 4121d and the third reinforcing rib 4121e intersect vertically to form a roughly "well"-shaped mesh structure. Of course, the second reinforcing rib 4121d and the third reinforcing rib 4121e may also intersect to form other shapes, such as a roughly diamond-shaped honeycomb structure.

[0152] As an example, see Figure 6 Two second reinforcing ribs 4121d are provided, and the two second reinforcing ribs 4121d are arranged at intervals along the first direction X and extend along the second direction Y. A plurality of third reinforcing ribs 4121e are provided, and the plurality of third reinforcing ribs 4121e are distributed at intervals along the second direction Y. Each third reinforcing rib 4121e extends along the first direction X and is connected to the two second reinforcing ribs 4121d.

[0153] A plurality of first reinforcing ribs 4121c are formed on the second side wall 4121b, each of which extends along the third direction Z, so that the strength of the second side wall 4121b can be improved; a plurality of second reinforcing ribs 4121d and a plurality of third reinforcing ribs 4121e are formed on the top wall 4121a, and the second reinforcing ribs 4121d intersect with the third reinforcing ribs 4121e, so that the strength of the top wall 4121a can be improved. Thus, the overall strength of the second housing 412 can be improved, so that the impact force along the third direction Z can be resisted, so as to better protect the circuit board.

[0154] In some embodiments, reference Figure 5 , a plurality of fourth reinforcing ribs 4111c are formed on the first side wall 4111b, and each fourth reinforcing rib 4111c extends along the third direction Z; and / or a plurality of fifth reinforcing ribs 4111d and a plurality of sixth reinforcing ribs 4111e are formed on the bottom wall 4111a, and the fifth reinforcing ribs 4111d intersect with the sixth reinforcing ribs 4111e.

[0155] A plurality of fourth reinforcing ribs 4111c are formed on the first side wall 4111b, and the fourth reinforcing ribs 4111c may be concave ribs on the outer surface of the first side wall 4111b. The plurality of fourth reinforcing ribs 4111c are distributed along the circumference of the first side wall 4111b. The fourth reinforcing ribs 4111c extend along the third direction Z, thereby improving the strength of the first side wall 4111b.

[0156] A plurality of fifth reinforcing ribs 4111d and a plurality of sixth reinforcing ribs 4111e are formed on the bottom wall 4111a, and the fifth reinforcing ribs 4111d intersect with the sixth reinforcing ribs 4111e, thereby improving the strength of the bottom wall 4111a.

[0157] The fifth reinforcing rib 4111d and the sixth reinforcing rib 4111e may intersect vertically or obliquely. The fifth reinforcing rib 4111d and the sixth reinforcing rib 4111e intersect vertically to form a roughly "well"-shaped mesh structure. Of course, the fifth reinforcing rib 4111d and the sixth reinforcing rib 4111e may also intersect to form other shapes, such as a roughly diamond-shaped honeycomb structure.

[0158] As an example, see Figure 5 There are two fifth reinforcing ribs 4111d, which are arranged at intervals along the first direction X and extend along the second direction Y. There are multiple sixth reinforcing ribs 4111e, which are distributed at intervals along the second direction Y. Each sixth reinforcing rib 4111e extends along the first direction X and is connected to the two fifth reinforcing ribs 4111d.

[0159] A plurality of fourth reinforcing ribs 4111c are formed on the first side wall 4111b, each of which extends along the third direction Z, so that the strength of the first side wall 4111b can be improved; a plurality of fifth reinforcing ribs 4111d and a plurality of sixth reinforcing ribs 4111e are formed on the bottom wall 4111a, and the fifth reinforcing ribs 4111d and the sixth reinforcing ribs 4111e intersect, so that the strength of the bottom wall 4111a can be improved. Thus, the overall strength of the first housing 411 can be improved, so that the impact force along the third direction Z can be resisted, so as to better protect the circuit board.

[0160] In some embodiments, reference Figure 4 The bracket 30 includes a protection plate 31, and the protection plate 31 is arranged opposite to the bottom wall 4111a along the third direction Z.

[0161] The shape of the protection plate 31 can be adapted to the shape of the bottom wall 4111a. As an example, the protection plate 31 can be a plate-shaped structure. The protection plate 31 can cover most of the bottom wall 4111a to further enhance the protection capability.

[0162] The material of the protection plate 31 can be selected to have a strength greater than that of the circuit board housing 41 .

[0163] The protection plate 31 and the bottom wall 4111 a are arranged opposite to each other along the third direction Z, so as to resist the bottom impact and protect the bottom wall 4111 a.

[0164] In some embodiments, the bracket 30 is a sheet metal member.

[0165] The sheet metal part can increase the strength of the bracket 30 , thereby improving the impact resistance, so as to better protect the circuit board housing 41 .

[0166] In some embodiments, the bracket 30 includes a plurality of bosses 32 , the first through holes 4141 and the second through holes 4142 correspond to the bosses 32 one by one, and the fasteners 50 are connected to the bosses 32 .

[0167] The boss 32 is used to provide a mounting position for fixing the circuit board housing 41. During installation, the first through hole 4141 and the second through hole 4142 of the circuit board housing 41 are aligned with the corresponding boss 32 respectively, and the fastener 50 passes through the first through hole 4141 and the second through hole 4142 and is connected to the corresponding boss 32 to lock the circuit board housing 41 to the bracket 30.

[0168] By having the bracket 30 include a plurality of bosses 32, and the fastener 50 connected to the bosses 32, the circuit board housing 41 can be firmly fixed to the bracket 30, thereby improving the connection reliability. In the embodiment where the folding portion 413 includes multiple bending segments, since the multiple bending segment structure can reduce the degree of warping at the folding position, it is convenient to position the boss 32 with the corresponding first through hole 4141 and second through hole 4142, thereby improving the positioning accuracy and installation efficiency.

[0169] In some embodiments, an antistatic layer is disposed on the surface of the circuit board housing 41 .

[0170] An antistatic layer may be provided on the inner surface and / or the outer surface of the circuit board housing 41. The antistatic coating may be formed on the surface of the circuit board housing 41 by spraying. The antistatic layer may also be formed on the surface of the circuit board housing 41 by pasting. The antistatic layer may be a conductive polymer (such as polyaniline, polypyrrole, etc.), a carbon-based coating (such as carbon nanotubes, graphene coating, etc.), an acrylic coating or an epoxy resin coating containing an antistatic agent, etc.

[0171] By providing an antistatic layer on the surface of the circuit board housing 41 , the antistatic capability of the circuit board housing 41 can be improved, thereby better protecting the circuit board.

[0172] In some embodiments, the circuit board housing 41 is a blister.

[0173] The blister can make the circuit board housing 41 thinner and thus more lightweight, and can be formed faster, thereby improving production efficiency.

[0174] Below, refer to Figures 2 to 11 , a specific example of the present application is described in detail.

[0175] The embodiment of the present application provides a battery device 100 , including a box body 10 , and a battery cell 20 , a bracket 30 , and an electronic control component 40 disposed in the box body 10 .

[0176] The electronic control component 40 is a battery supervision circuit (CSC), which is used to collect the status information of the battery cell 20 and transmit it to the battery management system (BMS). The electronic control component 40 includes a circuit board and a circuit board housing 41 that accommodates the circuit board. The circuit board is electrically connected to the battery cell 20. The circuit board housing 41 is a blister. The circuit board housing 41 includes a first shell 411, a second shell 412, and a folding portion 413 connecting the first shell 411 and the second shell 412. The first shell 411 and the second shell 412 can be close to each other around the folding portion 413. The first shell 411 is provided with a plurality of first through holes 4141, and the plurality of first through holes 4141 form two rows. The two rows of first through holes 4141 are provided on both sides of the first shell 411 along the first direction Z. The second shell 412 is provided with a plurality of second through holes 4142 , which form two rows. The two rows of second through holes 4142 are provided on both sides of the second shell 412 along the first direction Z. The plurality of second through holes 4142 correspond to the plurality of first through holes 4141 one by one.

[0177] The bracket 30 includes a leg 33, a protective plate 31, and a plurality of bosses 32. The leg 33 is used to be fixed to the box body 10. The protective plate 31 is arranged opposite to the bottom wall 4111a of the circuit board housing 41 along the third direction Z. The plurality of bosses 32 correspond to the first through hole 4141 and the second through hole 4142. The first through hole 4141 and the corresponding second through hole 4142 are penetrated by a fastener 50, which is connected to the corresponding boss 32, so that the circuit board housing 41 is fixed to the bracket 30.

[0178] The folding portion 413 includes a plurality of bending sections, which are configured as a "bow"-shaped structure to increase the size of the folding portion 413, so that when the first shell 411 and the second shell 412 are close to each other and cover each other, the degree of tilting of the folding position can be reduced, which facilitates the alignment of the first through hole 4141 and the second through hole 4142 with the corresponding protrusion 32, and improves the convenience of installation. In addition, the plurality of bending sections is also conducive to reducing space occupation and improving the space utilization rate of the battery device 100. The folding portion 413 is also provided with a weakening portion 415, which is a strip-shaped through hole extending along the second direction Y. When the first shell 411 and the second shell 412 are close to each other around the folding portion 413 and cover each other, the folding portion 413 can be bent more easily, reducing the risk of the cover position opening.

[0179] The bottom wall 4111a of the first shell 411 is provided with a tic-tac-toe reinforcing rib, and the first side wall 4111b of the first shell 411 is provided with a concave rib extending along the third direction Z. The top wall 4121a of the second shell 412 is provided with a tic-tac-toe reinforcing rib, and the second side wall 4121b of the second shell 412 is provided with a concave rib extending along the third direction Z.

[0180] The first housing 411 is also provided with a first protrusion 416 and two second protrusions 417 away from the folding portion 413 along the first direction X. The first protrusion 416 is located between the two second protrusions 417 and extends along the second direction Y. The cross section of the first protrusion 416 is in the shape of a Chinese character "X", and the second protrusion 417 is in the shape of a cylinder. The second housing 412 is provided with a first card slot corresponding to the first protrusion 416 and a second card slot corresponding to the second protrusion 417. The first protrusion 416 is interference-fitted with the first card slot, and the second protrusion 417 is interference-fitted with the second card slot. The surface of the circuit board housing 41 is also provided with an antistatic coating.

[0181] The embodiment of the present application further provides an electrical device, comprising: the battery device 100 according to any of the above embodiments.

[0182] Since the circuit board housing 41 in the battery device 100 can reliably protect the circuit board, thereby improving the reliability of the battery device 100, the power reliability of the power-consuming device including the battery device 100 is also improved.

[0183] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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: include: Battery cells; Bracket; An electric control component, comprising a circuit board and a circuit board housing, wherein the circuit board is electrically connected to the battery cell, the circuit board housing is connected to the bracket via a fastener, the circuit board housing comprises a first shell, a second shell and a folding portion, one side of the first shell along a first direction and one side of the second shell along the first direction are connected via the folding portion, the first shell and the second shell can be close to each other around the folding portion, so that the first shell and the second shell cover each other to form an accommodating space for accommodating the circuit board; The first shell is provided with a plurality of first through holes, the second shell is provided with a plurality of second through holes, the plurality of first through holes correspond to the plurality of second through holes one by one, and the fastener passes through the first through holes and the corresponding second through holes and is connected to the bracket.

2. The battery device according to claim 1, characterized in that: The plurality of first through holes are arranged in two rows, and the two rows of first through holes are respectively arranged on two sides of the first shell along the first direction; The plurality of second through holes are arranged in two rows, and the two rows of second through holes are respectively disposed on two sides of the second shell along the first direction.

3. The battery device according to claim 1, characterized in that: The folding portion includes a plurality of bending segments.

4. The battery device according to claim 1, characterized in that: The folded portion is provided with a weakened portion.

5. The battery device according to claim 4, characterized in that: The folding portion includes a first bending section, a second bending section and a connecting section, wherein the connecting section connects the first bending section and the second bending section, an end of the first bending section away from the connecting section is connected to the first shell, and an end of the second bending section away from the connecting section is connected to the second shell; Wherein, the weakening portion is arranged at the connecting section.

6. The battery device according to claim 1, characterized in that: The first housing includes a first housing body and a first flange portion, wherein the first flange portion is disposed on the outer peripheral side of the first housing body; The second housing includes a second housing body and a second flange portion, wherein the second flange portion is disposed on the outer peripheral side of the second housing body; The first through hole is disposed on the first flange portion, and the second through hole is disposed on the second flange portion.

7. The battery device according to claim 6, characterized in that: The first flange portion is formed with a first protrusion, the first protrusion is located on a side of the first shell away from the folding portion along the first direction, and the first protrusion extends along a second direction, and the second direction is perpendicular to the first direction; The second flange portion is formed with a first clamping groove, and the first protrusion is embedded in the first clamping groove and has an interference fit with the first clamping groove.

8. The battery device according to claim 7, characterized in that: The first flange portion is formed with at least two second protrusions, and the second protrusions are located on a side of the first shell away from the folding portion along the first direction; The second flange portion is formed with a plurality of second slots respectively corresponding to the positions of the plurality of second protrusions, and the second protrusions are embedded in the corresponding second slots and are interference-fitted with the second slots; Wherein, along the second direction, the first protrusion is located between at least two of the second protrusions.

9. The battery device according to claim 6, characterized in that: The first shell body includes a bottom wall and a first side wall, the first side wall is connected to the periphery of the bottom wall, and the bottom wall and the first side wall form a first groove; The second shell body comprises a top wall and a second side wall, the top wall and the bottom wall are arranged opposite to each other along a third direction, the second side wall is connected to the four sides of the top wall, the top wall and the second side wall form a second groove, the first groove and the second groove together form the accommodation space, and the third direction is perpendicular to the first direction; A plurality of first reinforcing ribs are formed on the second side wall, each of the first reinforcing ribs extending along the third direction; and / or, A plurality of second reinforcing ribs and a plurality of third reinforcing ribs are formed on the top wall, and the second reinforcing ribs intersect with the third reinforcing ribs.

10. The battery device according to claim 9, characterized in that: A plurality of fourth reinforcing ribs are formed on the first side wall, each of the fourth reinforcing ribs extending along the third direction; and / or, A plurality of fifth reinforcing ribs and a plurality of sixth reinforcing ribs are formed on the bottom wall, and the fifth reinforcing ribs intersect with the sixth reinforcing ribs.

11. The battery device according to claim 9, characterized in that: The bracket includes a protection plate, and the protection plate and the bottom wall are arranged opposite to each other along the third direction.

12. The battery device according to claim 1, characterized in that: The bracket is a sheet metal part.

13. The battery device according to claim 1, characterized in that: The bracket includes a plurality of bosses, the first through holes and the second through holes correspond to the bosses one by one, and the fasteners are connected to the bosses.

14. The battery device according to claim 1, characterized in that: An antistatic layer is arranged on the surface of the circuit board housing.

15. The battery device according to claim 1, characterized in that: The circuit board housing is a blister.

16. An electrical device, characterized in that: include: A battery device as claimed in any one of claims 1 to 15.

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