Battery device and electric equipment

Abstract

The utility model relates to a battery device and electric equipment, and the battery device comprises a box body which is provided with a containing cavity; the plurality of single batteries are arranged in the accommodating cavity along the first direction, and the two surfaces of each single battery along the first direction both comprise first wall surfaces; the first wall surfaces of two adjacent single batteries are connected through the buffer assembly; the buffering assembly comprises a plurality of buffering strips, all the buffering strips are sequentially spliced end to end along the circumferential edge of the first wall face to form a ring shape, the end of one buffering strip in any two adjacent buffering strips is provided with a concave part, and the end of the other buffering strip is provided with a protruding part matched with the concave part in a clamped mode. According to the battery device, the problem that structural adhesive at the bottom of the battery box body overflows to a large area of the battery monomer through a splicing gap between the rubber strips, so that the service life of the battery monomer is influenced is solved.

Description

Technical Field

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

[0002] During the battery production process, when multiple battery cells are loaded into a battery box and assembled into a group, structural adhesive is generally set at the bottom of the box to bond and fix the battery cells. The structural adhesive at the bottom of the box tends to overflow upward to a large area of ​​the battery cell. After the structural adhesive solidifies into a colloid block, the battery cell will directly contact and collide with the colloid block when it expands, causing local stress on the battery cell, affecting the service life of the battery cell. Utility Model Content

[0003] The present application aims to solve the problem that the structural adhesive at the bottom of the current battery box easily overflows through the joint gaps between the rubber strips to the large surface area of ​​the battery cell and affects the service life of the battery cell, and provides a battery device and electrical equipment.

[0004] In a first aspect, the present application provides a battery device, comprising:

[0005] A box body, wherein the box body has a containing cavity;

[0006] A plurality of battery cells, wherein the plurality of battery cells are arranged in the accommodation cavity along a first direction, and both surfaces of the battery cells along the first direction include a first wall surface;

[0007] A buffer assembly, wherein the first wall surfaces of two adjacent battery cells are connected by the buffer assembly;

[0008] Wherein, the buffer assembly includes a plurality of buffer strips, all of which are spliced ​​end to end in a ring shape along the circumferential edge of the first wall surface, and a recess is provided at the end of one of any two adjacent buffer strips, and a protrusion that engages with the recess is provided at the end of the other buffer strip.

[0009] The battery device according to the first aspect of the present application has at least the following beneficial effects:

[0010] The battery device of the present application provides a recessed portion at the end of one of any two adjacent buffer bars and a raised portion at the end of the other buffer bar, so that the two adjacent buffer bars on the first wall are spliced ​​and connected by the snap-fitting of the recessed portion and the raised portion, that is, the splicing of the two adjacent buffer bars is connected by the snap-fitting of the recessed portion and the raised portion, thereby eliminating the splicing gap between the two adjacent buffer bars, making it difficult for the two adjacent buffer bars to loosen, and strengthening the sealing of the annular structure formed by splicing all the buffer bars, thereby reducing the probability of the structural glue at the bottom of the box overflowing to the first wall of the battery cell, thereby reducing the probability of structural damage to the battery cell, improving the stability and reliability of the battery cell, and correspondingly improving the service life of the battery cell.

[0011] In some embodiments, the first wall surface is a wall surface with the largest area on the battery cell.

[0012] Such an arrangement enables the plurality of buffer strips to effectively absorb the expansion force of the battery cell in the expansion direction, thereby playing a buffering role for the battery cell, reducing the probability of damage to the battery cell, and increasing the service life of the battery cell.

[0013] In some embodiments, the recessed portion includes a plurality of sawtooth grooves connected in sequence, and the raised portion includes a plurality of sawtooth blocks connected in sequence, and the sawtooth blocks are correspondingly meshed with the sawtooth grooves.

[0014] Such a configuration can increase the engagement area between the recessed portion and the raised portion, stably engage the splicing position of two adjacent buffer strips, further prevent the two adjacent buffer strips from loosening, and enhance the sealing of the annular structure formed by splicing all buffer strips.

[0015] In some embodiments, the recessed portion is configured as a groove, and the raised portion is correspondingly configured as a bump.

[0016] Such a configuration enables the recessed portion and the raised portion to form a tight interference connection, and also enables two adjacent buffer strips to be conveniently connected through the concave-convex plug-in fit formed by the recessed portion and the raised portion, thereby simplifying the splicing efficiency of all buffer strips.

[0017] In some embodiments, the recessed portion is configured as one of a rectangular groove, an arc-shaped groove, a T-shaped groove, and a trapezoidal groove, and the raised portion is correspondingly configured as one of a rectangular bump, an arc-shaped bump, a T-shaped bump, and a trapezoidal bump.

[0018] Such a configuration enables the recessed portion and the raised portion to form a tight interference connection, and also enables two adjacent buffer strips to be conveniently connected through the concave-convex plug-in fit formed by the recessed portion and the raised portion, thereby simplifying the splicing efficiency of all buffer strips.

[0019] In some embodiments, the recessed portion is a step groove formed on the end of the buffer bar, and the raised portion is a step block formed on the end of an adjacent buffer bar.

[0020] In this way, the step block on the buffer strip overlaps the step groove on the adjacent buffer strip, thus realizing the splicing connection of two adjacent buffer strips. The cooperation of the step groove and the step block can also effectively eliminate the splicing gap between two adjacent buffer strips, and enhance the sealing of the annular structure formed by splicing all buffer strips.

[0021] In some embodiments, the recessed portion is an inclined surface formed on the end of the buffer strip, and the raised portion is a wedge block formed on the end of an adjacent buffer strip, and the wedge block fits snugly with the inclined surface.

[0022] With this arrangement, the wedge blocks on the buffer strips are correspondingly fitted onto the inclined surfaces on the adjacent buffer strips, so that the splicing positions between the two adjacent buffer strips can be matched through the inclined surfaces, which can not only effectively reduce the splicing gap between the two adjacent buffer strips, but also achieve convenient connection, simplifying the splicing efficiency of all buffer strips.

[0023] In some embodiments, the buffer strip has a third wall surface and a fourth wall surface that are oppositely arranged in the first direction, and the third wall surface and the fourth wall surface are respectively provided with a first adhesive layer and a second adhesive layer.

[0024] Such an arrangement can stabilize the buffer bar on the first wall surface of the battery cell, reduce the probability of the buffer bar falling off the first wall surface, and improve the overall assembly stability of the buffer assembly.

[0025] In some embodiments, among two adjacent buffer strips, one buffer strip is one of a rubber strip, a silicone strip and a plastic strip, and the other buffer strip is a foam strip.

[0026] Such arrangement enables all buffer strips to have elastic deformation capability, so that the joint position between two adjacent buffer strips forms an interference fit through the corresponding recessed portions and raised portions, thereby enhancing the sealing of the annular structure formed by splicing all buffer strips and, at the same time, appropriately reducing the structural cost of the buffer assembly.

[0027] In a second aspect, the present application provides an electrical device, wherein the electrical device comprises the battery device of the above embodiment, and the battery device is used to provide electrical energy.

[0028] The electrical equipment according to the second aspect of the present application has at least the following beneficial effects:

[0029] The electrical equipment of the present application is equipped with the above-mentioned battery device, so the battery device has reliability in use, which is beneficial to improving the reliability and service life of the electrical equipment.

[0030] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0032] Figure 1 A schematic diagram of the structure of a vehicle according to an embodiment of the present application.

[0033] Figure 2 Another structural schematic diagram of a vehicle according to an embodiment of the present application.

[0034] Figure 3 It is a structural exploded view of a battery device according to an embodiment of the present application.

[0035] Figure 4 It is a schematic diagram of the coordination structure of multiple battery cells according to an embodiment of the present application.

[0036] Figure 5 This is a structural exploded view of a battery cell according to an embodiment of the present application.

[0037] Figure 6 Schematic diagram of the matching structure of two adjacent battery cells according to an embodiment of the present application.

[0038] Figure 7 It is a schematic diagram of the matching structure of the battery cell and the buffer assembly according to an embodiment of the present application.

[0039] Figure 8 This is a structural exploded view of the buffer assembly according to an embodiment of the present application.

[0040] Fig. 9 It is a schematic diagram of another matching structure of two adjacent battery cells according to an embodiment of the present application.

[0041] Fig.10 Another structural exploded view of the buffer assembly according to an embodiment of the present application.

[0042] Fig.11 The structure of the buffer assembly of the embodiment of the present application is shown in FIG. Figure 1 .

[0043] Fig.12 The structure of the buffer assembly of the embodiment of the present application is shown in FIG. Figure 2.

[0044] Fig.13 The structure of the buffer assembly of the embodiment of the present application is shown in FIG. Figure 3 .

[0045] Fig.14 The structure of the buffer assembly of the embodiment of the present application is shown in FIG. Figure 4 .

[0046] Fig.15 The structure of the buffer assembly of the embodiment of the present application is shown in FIG. Figure 5 .

[0047] Fig.16 Schematic diagram of the structure of the buffer strip according to an embodiment of the present application.

[0048] Fig.17 This is a schematic diagram of the manufacture and assembly of the buffer component of an embodiment of the present application.

[0049] Explanation of the reference numerals: battery device 10; motor 20; vehicle 30; controller 40; housing 100; first part 101; second part 102; accommodating chamber 110; battery cell 200; first wall 210; second wall 220; electrode assembly 201; shell 202; end cover 203; long buffer member 3; first inclined surface 301; second inclined surface 303; V-shaped notch 302; buffer assembly 300; buffer strip 310; recessed portion 311; serrated groove 3111; serrated block 3112; raised portion 312; third wall 313; fourth wall 314; first adhesive layer 315; second adhesive layer 316; thermal conductor 400; first direction X; second direction Y; third direction Z. DETAILED DESCRIPTION

[0050] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only 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.

[0051] In the description of the present application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0052] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0053] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0054] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0055] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0056] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0057] The battery is composed of one or more battery cells. For each battery, the battery cells that make up the battery can be connected in series, in parallel, or in mixed connection. Mixed connection means that the battery cells are connected in series and in parallel.

[0058] A battery cell is the smallest unit that makes up a battery. In the structure of a battery cell, it includes a shell, an electrolyte, and an electrode assembly. The electrode assembly is the component that undergoes electrochemical reactions in the battery cell. The electrode assembly includes a positive electrode sheet, a negative electrode sheet, and a separator. The shell may include one or more electrode assemblies. The electrode assembly is mainly formed by winding or stacking a positive electrode sheet and a negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet.

[0059] The shell is a structure with one end open and a hollow interior. The electrode assembly is arranged inside the shell, and the end cover is arranged at the opening of the shell. The internal environment of the battery cell is formed by covering the opening with the end cover. Of course, the end cover and the shell can also be integrated. Specifically, the end cover and the shell can form a common connection surface before other components are put into the shell. When the interior of the shell needs to be encapsulated, the end cover is closed with the shell. The shell can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell can be determined according to the specific shape and size of the electrode assembly. The shell can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose any special restrictions on this.

[0060] During the battery production process, when multiple battery cells are installed into a battery box and assembled into a group, structural adhesive is generally provided at the bottom of the box to bond and fix the battery cells.

[0061] In the related art, a plurality of rubber strips are usually pasted around the large surface of at least one of two adjacent battery cells. The plurality of rubber strips are spliced ​​end to end to form a U-shaped frame structure. After all the battery cells are assembled into a group in the battery box, the frame structure acts as a buffer between the two adjacent battery cells, providing deformation space for the expansion of the battery cells.

[0062] However, the frame structure formed by splicing multiple rubber strips end to end is prone to have a large splicing gap at the joint between two adjacent rubber strips due to the existence of splicing assembly errors. When multiple battery cells are loaded into the battery case and assembled into a group, the structural adhesive at the bottom of the battery case is prone to overflow upward and overflow to the large surface area of ​​the battery cell through the splicing gap between the rubber strips. After the structural adhesive solidifies into a colloid block, the battery cell will directly contact and collide with the colloid block when it expands, causing local stress on the battery cell, resulting in adverse conditions such as hard rupture and damage of the battery cell shell and leakage of electrolyte in the battery cell, thereby affecting the service life of the battery cell.

[0063] Based on this, in order to address the problem that the structural adhesive at the bottom of the current battery box is easily overflowed from the rubber strips to a large area of ​​the battery cell and affect the service life of the battery cell, one or more embodiments of the present application provide a battery device, by providing a recessed portion at the end of one of any two adjacent buffer strips and a raised portion at the end of the other buffer strip, so that the two adjacent buffer strips on the first wall are spliced ​​and connected by the snap-fitting fit of the recessed portion and the raised portion, that is, the splicing of the two adjacent buffer strips is connected by the snap-fitting fit of the recessed portion and the raised portion, thereby eliminating the splicing gap between the two adjacent buffer strips, making it difficult for the two adjacent buffer strips to loosen, and strengthening the sealing of the annular structure formed by splicing all the buffer strips, thereby reducing the probability of the structural adhesive at the bottom of the box overflowing to the first wall of the battery cell, thereby reducing the probability of structural damage to the battery cell, improving the stability and reliability of the battery cell, and correspondingly improving the service life of the battery cell.

[0064] The battery device of the embodiment of the present application can be used in electrical equipment that uses the battery device as a power source, or various energy storage systems that use the battery device as an energy storage element. The electrical equipment can be, but is not limited to, mobile phones, tablets, laptops, electric toys, electric tools, battery cars, electric cars, ships, spacecraft, etc. Among them, electric toys can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0065] See also Figure 1 and Figure 2 , Figure 1This is a schematic diagram of the structure of a vehicle of some embodiments of the present application. The vehicle 30 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 10 is provided inside the vehicle 30, and the battery device 10 may be provided at the bottom, head or tail of the vehicle 30. The battery device 10 may be used to power the vehicle 30, for example, the battery device 10 may be used as an operating power source for the vehicle 30. The vehicle 30 may also include a controller 40 and a motor 20, and the controller 40 is used to control the battery device 10 to power the motor 20, for example, for starting, navigating and driving the vehicle 30. Working power requirements.

[0066] Of course, in other embodiments, the battery device 10 can not only serve as an operating power source for the vehicle 30 , but also serve as a driving power source for the vehicle 30 , replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 30 .

[0067] See also Figure 3 and Figure 4 The battery device 10 mentioned in the present application may include a battery module or a battery pack, etc.

[0068] See also Figure 3 , Figure 4 , Figure 5 and Figure 6 An embodiment of the present application provides a battery device 10 , which includes a box 100 , a buffer assembly 300 and a plurality of battery cells 200 .

[0069] The housing 100 has a receiving cavity 110 . A plurality of battery cells 200 are arranged in the receiving cavity 110 along a first direction X. Both surfaces of the battery cells 200 along the first direction X include a first wall surface 210 .

[0070] The first walls 210 of two adjacent battery cells 200 are connected by the buffer assembly 300 .

[0071] Among them, see Figure 7 and Figure 8 The buffer assembly 300 includes a plurality of buffer strips 310, all of which are spliced ​​end to end along the circumferential edge of the first wall surface 210 to form a ring. A recess 311 is provided at the end of one of any two adjacent buffer strips 310, and a protrusion 312 that engages with the recess 311 is provided at the end of the other buffer strip 310.

[0072] It should be noted that in this application, see Figure 3The box body 100 may include a first part 101 and a second part 102, the first part 101 and the second part 102 cover each other, and the first part 101 and the second part 102 jointly define a accommodating cavity 110 for accommodating the battery cell 200. The box body 100 formed by the first part 101 and the second part 102 covering each other may be in various shapes, such as a cylinder, a cuboid, etc.

[0073] The first part 101 may be a hollow structure with one end open, and the second part 102 may be a plate-like structure, and the second part 102 covers the open end of the first part 101. Of course, the first part 101 and the second part 102 may also be hollow structures with one side open, and the open side of the first part 101 covers the open side of the second part 102 to form the box body 100 with the accommodating cavity 110.

[0074] In the present application, the first direction X may refer to the length direction or width direction of the box 100, the second direction Y corresponds to the width direction or length direction of the box 100, and the third direction Z corresponds to the height direction of the box 100. The first direction X, the second direction Y, and the third direction Z are perpendicular to each other. When the box 100 is cylindrical, the first direction X and the second direction Y correspond to two mutually orthogonal radial directions of the box 100, and the third direction Z also corresponds to the height direction of the box 100.

[0075] Multiple battery cells 200 may be arranged in a single row and multiple columns, such as multiple battery cells 200 are arranged in a row along the first direction X. Of course, multiple battery cells 200 may also be arranged in multiple rows and multiple columns, with the row direction corresponding to the first direction X and the column direction corresponding to the second direction Y.

[0076] In this application, see Figure 5 The battery cell 200 includes one or more electrode assemblies 201, a shell 202, and an end cap 203. The shell 202 and the end cap 203 form the outer shell of the battery cell 200, and the outer wall of the shell 202 and the outer wall of the end cap 203 are both called the outer wall of the battery cell 200. When the shell 202 is a rectangular body, the outer wall of the shell 202 includes a shell bottom wall and a shell side wall.

[0077] It is easy to understand that, see Figure 4 and Figure 5The first wall 210 of the battery cell 200 mentioned in the present application refers to the outer wall of the shell 202 of the battery cell 200 along the first direction X. The battery cell 200 also includes a second wall 220, which refers to the outer wall of the shell 202 of the battery cell 200 or the outer wall of the end cover 203 of the battery cell 200. The second wall 220 is distributed along the second direction Y or the third direction Z of the battery cell 200. The first wall 210 and the second wall 220 form an angle, that is, the first wall 210 and the second wall 220 are two adjacent outer walls of the battery cell 200, rather than two parallel and opposite outer walls.

[0078] For example, see Figure 4 and Figure 5 The first wall 210 of the battery cell 200 is the largest outer wall of the battery cell 200, which can also be called the large surface of the battery cell 200. The second wall 220 of the battery cell 200 is an outer wall on the battery cell 200 with an area smaller than the first wall 210, such as the side wall, bottom wall, and top wall of the battery cell 200.

[0079] In the present application, along the first direction X, the first walls 210 of two adjacent battery cells 200 are connected by the buffer assembly 300. Specifically, the buffer assembly 300 is disposed on at least one of the first walls 210 of the two adjacent battery cells 200. For example, the first walls 210 of the two adjacent battery cells 200 are both provided with the buffer assembly 300; or, see Figure 6 , a buffer assembly 300 is disposed on the first wall surface 210 of one of the two adjacent battery cells 200. It is easy to understand that along the first direction X, the buffer assembly 300 is located between the two adjacent battery cells 200.

[0080] In the buffer assembly 300 of the present application, the buffer strip 310 is constructed as a strip structure that can be elastically deformed under force. For example, the buffer strip 310 can be a rubber strip, a silicone strip, a plastic strip, etc. On the first wall 210 of the battery cell 200, multiple buffer strips 310 are spliced ​​end to end along the circumferential edge of the first wall 210 to form a ring. The buffer strip 310 can be a rectangular strip or an arc strip, etc. Correspondingly, the ring formed by the multiple buffer strips 310 spliced ​​end to end is a rectangular ring, a polygonal ring or a circular ring, etc.

[0081] The buffer strip 310 can be bonded and fixed to the first wall surface 210 of the battery cell 200 by means of adhesive structures such as glue and adhesive film. A plurality of buffer strips 310 can be bonded to the first wall surface 210 of the battery cell 200 manually or by a robot and spliced ​​end to end in sequence, and the splicing of any two adjacent buffer strips 310 is connected by the snap fit of the recessed portion 311 and the raised portion 312.

[0082] See also Figure 7 and Figure 8 In the buffer assembly 300, the ends of two adjacent buffer strips 310 are spliced, and opposite ends of each buffer strip 310 are respectively provided with a recessed portion 311 and a raised portion 312; or, opposite ends of one of the two adjacent buffer strips 310 are provided with a recessed portion 311, and opposite ends of the other buffer strip 310 are provided with a raised portion 312. In this way, the recessed portion 311 on the buffer strip 310 is engaged with the raised portion 312 on the adjacent buffer strip 310.

[0083] It should be noted that when all battery cells 200 are grouped in the box body 100, the bottom walls of all battery cells 200 are fixed in the box body 100 by the structural adhesive at the bottom of the box body 100, and two battery cells 200 adjacent along the first direction X are correspondingly connected by the annular structure formed by splicing multiple buffer strips 310.

[0084] See also Figure 4 and Figure 6 During the use of the battery device 10, when the battery cell 200 expands and squeezes the adjacent battery cell 200 in the first direction X, the annular structure formed by the plurality of buffer bars 310 is squeezed by the expansion pressure of the battery cell 200 and deforms in the first direction X to absorb the expansion force of the battery cell 200, thereby playing a buffering role for the battery cell 200, reducing the probability of damage to the battery cell 200, and improving the stability and reliability of the battery cell 200.

[0085] In the battery device 10 of the present application, a recessed portion 311 is provided at the end of one of the buffer bars 310 of any two adjacent buffer bars 310, and a protruding portion 312 is provided at the end of the other buffer bar 310, so that the two adjacent buffer bars 310 on the first wall surface 210 are spliced ​​and connected by the snap-fitting of the recessed portion 311 and the protruding portion 312, that is, the splicing of the two adjacent buffer bars 310 is connected by the snap-fitting of the recessed portion 311 and the protruding portion 312, thereby eliminating the splicing gap between the two adjacent buffer bars 310, making it difficult for the two adjacent buffer bars 310 to loosen, and strengthening the sealing of the annular structure formed by splicing all the buffer bars 310, thereby reducing the probability of the structural glue at the bottom of the box body 100 overflowing to the first wall surface 210 of the battery cell 200, thereby reducing the probability of structural damage to the battery cell 200, improving the use stability and reliability of the battery cell 200, and correspondingly improving the service life of the battery cell 200.

[0086] In some embodiments of the present application, see Figure 4 , Figure 5 and Figure 6 The first wall surface 210 is the wall surface with the largest area on the battery cell 200 .

[0087] Specifically, when the battery cell 200 is a rectangular body, the first wall 210 corresponds to the large surface of the battery cell 200 (the front and back of the battery cell 200 ), and the second wall 220 corresponds to the side surface, bottom surface or top surface of the battery cell 200 .

[0088] When the battery cell 200 is a cylinder, the first wall surface 210 corresponds to at least a portion of the circumference of the battery cell 200 , and the second wall surface 220 corresponds to the bottom surface or the top surface of the battery cell 200 .

[0089] It should be noted that during the use of the battery device 10, the battery cell 200 will expand toward the wall with the largest area. Based on this, the annular structure formed by splicing multiple buffer bars 310 end to end is arranged on the wall with the largest area of ​​the battery cell 200, so that the multiple buffer bars 310 can effectively absorb the expansion force of the battery cell 200 in the expansion direction, play a buffering role for the battery cell 200, reduce the probability of damage to the battery cell 200, and increase the service life of the battery cell 200.

[0090] In addition, in some embodiments of the present application, see Figure 3 and Figure 4 When the battery cell 200 is a rectangular body and all the battery cells 200 are arranged in the accommodating cavity 110 of the box body 100 in the form of multiple rows and columns, in the second direction Y, that is, the direction in which the columns are located, the second wall surface 220 of the battery cell 200 is perpendicular to the second direction Y, and in the direction of the rows, the first wall surface 210 of the battery cell 200 is perpendicular to the first direction X. At this time, the first wall surface 210 corresponds to the large surface of the battery cell 200 and the second wall surface 220 corresponds to the side surface of the battery cell 200.

[0091] See also Fig. 9 Along the second direction Y, a heat conductive member 400 is provided on the second wall surface 220 of at least one of two adjacent battery cells 200. The second wall surfaces 220 of two adjacent battery cells 200 can be in contact with each other through the heat conductive member 400. The heat conductive member 400 is used for heat conduction, thereby reducing the risk of heat concentration when thermal runaway occurs in the battery cell 200 and improving the use stability and reliability of the battery cell 200.

[0092] Illustratively, the heat conducting member 400 may be a heat conducting strip, a heat conducting pad, or the like.

[0093] In some embodiments of the present application, see Fig.10 and Fig.11 The recessed portion 311 includes a plurality of sawtooth grooves 3111 connected in sequence, and the raised portion 312 includes a plurality of sawtooth blocks 3112 connected in sequence, and the sawtooth blocks 3112 are correspondingly engaged with the sawtooth grooves 3111.

[0094] Specifically, the buffer strip 310 is in the shape of a long strip, and a plurality of sawtooth grooves 3111 are provided at the ends of the buffer strip 310, and the plurality of sawtooth grooves 3111 are sequentially connected along the length direction or the width direction of the buffer strip 310 to form a continuous sawtooth recessed portion 311. Correspondingly, a plurality of sawtooth blocks 3112 are provided at the ends of adjacent buffer strips 310, and the plurality of sawtooth blocks 3112 are sequentially connected along the width direction or the length direction of the adjacent buffer strips 310 to form a continuous sawtooth raised portion 312.

[0095] In one embodiment, all the sawtooth grooves 3111 on the buffer strip 310 may have the same shape, such as V-shaped grooves or U-shaped grooves, etc., and correspondingly, all the sawtooth blocks 3112 on adjacent buffer strips 310 may have the same shape. In another embodiment, all the sawtooth grooves 3111 on the buffer strip 310 may have different shapes, and correspondingly, all the sawtooth blocks 3112 on adjacent buffer strips 310 may also have different shapes.

[0096] It is not difficult to understand that by setting the recessed portion 311 as a plurality of sawtooth grooves 3111 connected in sequence and the raised portion 312 as a plurality of sawtooth blocks 3112 connected in sequence, the engagement area between the recessed portion 311 and the raised portion 312 can be increased, so that the splicing position of the two adjacent buffer strips 310 can be stably engaged, further making it difficult for the two adjacent buffer strips 310 to loosen, thereby enhancing the sealing of the annular structure formed by splicing all the buffer strips 310.

[0097] In some embodiments of the present application, see Fig.12 and Fig.13 The recessed portion 311 is configured as a groove, and the raised portion 312 is correspondingly configured as a bump.

[0098] Specifically, the groove-shaped recessed portion 311 and the bump-shaped raised portion 312 are interference-fitted to achieve a tight engagement.

[0099] The recessed portion 311 is a rectangular groove, and the protruding portion 312 is a corresponding rectangular block. Alternatively, the recessed portion 311 is a dovetail groove, and the protruding portion 312 is a dovetail block; or the recessed portion 311 is an arc-shaped groove, and the protruding portion 312 is an arc-shaped block; or the recessed portion 311 is a T-shaped groove, and the protruding portion 312 is a T-shaped block; or the recessed portion 311 is a trapezoidal groove, and the protruding portion 312 is a trapezoidal block.

[0100] Of course, in other embodiments, the recessed portion 311 may include a plurality of connected grooves, all of which may be selected from rectangular grooves, dovetail grooves, arc grooves, T-shaped grooves, trapezoidal grooves, etc., and correspondingly, the raised portion 312 includes a plurality of connected protrusions, all of which may be selected from rectangular protrusions, dovetail blocks, arc protrusions, T-shaped blocks, trapezoidal blocks, etc. In this way, the strength of the splicing connection between two adjacent buffer strips 310 is improved.

[0101] It is not difficult to understand that by constructing the recessed portion 311 as a groove and the raised portion 312 as a corresponding protrusion, the recessed portion 311 and the raised portion 312 can form a tight interference connection, and at the same time, the two adjacent buffer strips 310 can also be conveniently connected through the concave-convex plug-in fit formed by the recessed portion 311 and the raised portion 312, thereby simplifying the splicing efficiency of all buffer strips 310.

[0102] In some embodiments of the present application, see Fig.14 The recessed portion 311 is a step groove formed on the end of the buffer strip 310 , and the raised portion 312 is a step block formed on the end of an adjacent buffer strip 310 .

[0103] Specifically, in two adjacent buffer bars 310, step grooves are formed at opposite ends of one buffer bar 310, and step blocks are formed at opposite ends of the other buffer bar 310. Alternatively, step grooves and step blocks are formed at opposite ends of each buffer bar 310, respectively. The step grooves and step blocks overlap each other.

[0104] In other embodiments, the step groove may include a plurality of step sub-grooves distributed in a stairway, and correspondingly, the step block includes a plurality of step sub-blocks distributed in a stairway, so as to improve the matching stability between the step groove and the step block.

[0105] It is easy to understand that by configuring the recessed portion 311 as a step groove and configuring the protruding portion 312 as a step block, the step block on the buffer strip 310 is overlapped on the step groove on the adjacent buffer strip 310, so as to realize the splicing connection of two adjacent buffer strips 310. The cooperation of the step groove and the step block can also effectively eliminate the splicing gap between two adjacent buffer strips 310, and enhance the sealing of the annular structure formed by splicing all buffer strips 310.

[0106] In some embodiments of the present application, see Fig.15 The recessed portion 311 is an inclined surface formed on the end of the buffer strip 310 , and the raised portion 312 is a wedge block formed on the end of the adjacent buffer strip 310 , and the wedge block and the inclined surface fit together.

[0107] Specifically, of the two adjacent buffer strips 310, one buffer strip 310 has inclined surfaces formed at both opposite ends, and the corresponding inclination angle of the inclined surfaces can be 30° to 80°, and the other buffer strip 310 has wedges formed at both opposite ends, and the butt joint surface of the wedge with the inclined surface is also an inclined surface. Alternatively, an inclined surface and a wedge are formed at the opposite ends of each buffer strip 310, respectively. The inclined surface and the wedge are fitted in a corresponding manner.

[0108] By constructing the recessed portion 311 as an inclined surface and the protruding portion 312 as a wedge block, the wedge block on the buffer strip 310 is correspondingly fitted onto the inclined surface on the adjacent buffer strip 310, so that the splicing position between the two adjacent buffer strips 310 can be matched with the inclined surface, which can not only effectively reduce the splicing gap between the two adjacent buffer strips 310, but also achieve convenient connection, thereby simplifying the splicing efficiency of all buffer strips 310.

[0109] In some embodiments of the present application, see Fig.16 The buffer strip 310 has a third wall surface 313 and a fourth wall surface 314 which are arranged opposite to each other in the first direction X. The third wall surface 313 and the fourth wall surface 314 are respectively provided with a first adhesive layer 315 and a second adhesive layer 316 .

[0110] Specifically, the first adhesive layer 315 and the second adhesive layer 316 may be, but are not limited to, adhesive films with adhesive functions such as 3M tape and PET double-sided tape.

[0111] It is easy to understand that along the first direction X, the third wall surface 313 of the buffer bar 310 is fixed to the edge position of the first wall surface 210 of the battery cell 200 through the first adhesive layer 315, and all the buffer bars 310 are spliced ​​end to end in sequence to form a closed annular structure, and the first wall surfaces 210 of adjacent battery cells 200 are correspondingly bonded to the second adhesive layer 316 on the fourth wall surfaces 314 of all the buffer bars 310. In this way, the first wall surfaces 210 of two adjacent battery cells 200 are connected through the annular structure formed by splicing all the buffer bars 310, so that all the buffer bars 310 can effectively absorb the expansion force of the battery cell 200 and effectively buffer the battery cell 200.

[0112] By respectively providing a first adhesive layer 315 and a second adhesive layer 316 having an adhesive function on the third wall 313 and the fourth wall 314 that are relatively arranged along the first direction X of the buffer bar 310, the buffer bar 310 can be firmly fixed on the first wall 210 of the battery cell 200, thereby reducing the probability of the buffer bar 310 falling off from the first wall 210 and improving the overall assembly stability of the buffer assembly 300.

[0113] In some embodiments of the present application, among two adjacent buffer strips 310 , one buffer strip 310 is one of a rubber strip, a silicone strip and a plastic strip, and the other buffer strip 310 is a foam strip.

[0114] It should be noted that rubber strips, silicone strips, plastic strips and foam strips all have elastic deformation capabilities, and compared to rubber strips, silicone strips and plastic strips, foam strips have lower costs.

[0115] Specifically, the buffer component 300 has four buffer strips 310 , which are sequentially spliced ​​end to end to form a rectangular ring, two buffer strips 310 that are opposite to each other are rubber strips, and another two buffer strips 310 that are opposite to each other are foam rubber strips.

[0116] Such arrangement enables all buffer strips 310 to have elastic deformation capability, so that the splicing position between two adjacent buffer strips 310 forms an interference fit through the corresponding recessed portion 311 and raised portion 312, thereby enhancing the sealing of the annular structure formed by splicing all buffer strips 310 and, at the same time, appropriately reducing the structural cost of the buffer assembly 300.

[0117] In addition, see Fig.17 In some embodiments of the present application, the battery cell 200 is a rectangular body, and the battery device 10 further includes a long buffer 3. Along the length direction of the long buffer 3, the opposite ends of the long buffer 3 are provided with a first inclined surface 301 and a second inclined surface 303, respectively. The first inclined surface 301 and the second inclined surface 303 are symmetrically distributed relative to the perpendicular bisector of the long buffer 3, and the first inclined surface 310 is inclined at an angle of 45° relative to the length direction of the buffer 3. At the same time, along the length direction of the long buffer 3, three V-shaped openings 302 are spaced apart on the long buffer 3, and the cross section of the V-shaped opening 302 is an isosceles right triangle. A buffer strip 310 is formed between the first inclined surface 301 and the adjacent V-shaped opening 302, a buffer strip 310 is formed between two adjacent V-shaped openings 302, and a buffer strip 310 is formed between the second inclined surface 303 and the adjacent V-shaped opening 302.

[0118] In this way, four buffer strips 310 connected in sequence are formed on the long buffer member 3. It should be noted that the long buffer member 3 can be bent relative to any position in its length direction.

[0119] With such arrangement, any two adjacent buffer strips 310 on the long buffer member 3 can be bent 90° by the V-shaped notch 302 to form a closed rectangular ring structure, which can be fixed on the circumferential edge of the first wall 210 of the battery cell 200 .

[0120] Compared with the method of splicing and connecting each independent buffer strip 310 one by one, the above arrangement can simplify the assembly efficiency of the buffer assembly 300, and can completely eliminate assembly tolerances, eliminate the gap between two adjacent buffer strips 310, and further enhance the sealing of the annular structure formed by all buffer strips 310.

[0121] It can be understood that in the embodiment of the present application, a V-shaped groove 302 can be set at a preset position of the long buffer member 3 based on the size of the first wall 210 of the battery cell 200, so that the length of the corresponding buffer strip 310 is roughly equal to the length or width of the first wall 210, so that the closed annular structure formed by connecting four buffer strips 310 end to end in sequence is distributed along the circumferential edge of the first wall 210.

[0122] In addition, an embodiment of the present application further provides an electrical device, which includes a battery device according to any of the above embodiments, and the battery device is used to provide electrical energy.

[0123] Specifically, see Figure 1 and Figure 2 , the electrical equipment may be a vehicle 30, a mobile phone, a portable device, a laptop computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle may be a fuel vehicle, a gas vehicle, or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle, or an extended-range vehicle, and the like; the spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, and the like; the electric toy includes a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like; the electric tool includes a metal cutting electric tool, a grinding electric tool, an assembly electric tool, and an electric tool for railways, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact drill, a concrete vibrator, and an electric planer, and the like. The embodiments of the present application do not impose any special restrictions on the above-mentioned electrical equipment.

[0124] Since the electric device according to the embodiment of the present application is equipped with the above-mentioned battery device, the battery device has reliability in use, which is beneficial to improving the reliability and service life of the electric device.

[0125] See also Figures 1 to 17 In some embodiments of the present application, the present application provides a battery device 10 and an electric device. The electric device includes the battery device 10.

[0126] The battery device 10 comprises: a box body 100, the box body 100 has a receiving cavity 110; a plurality of battery cells 200, the plurality of battery cells 200 are arranged in the receiving cavity 110 along a first direction X, and both surfaces of the battery cells 200 along the first direction X include a first wall surface 210. A buffer assembly 300, the first walls 210 of two adjacent battery cells 200 are connected by the buffer assembly 300; wherein the buffer assembly 300 comprises a plurality of buffer bars 310, all of which are sequentially spliced ​​end to end along the circumferential edge of the first wall surface 210 to form a ring, and a recessed portion 311 is provided at the end of one of any two adjacent buffer bars 310, and a protruding portion 312 engaging with the recessed portion 311 is provided at the end of the other buffer bar 310.

[0127] In the battery device 10 of the present application, a recessed portion 311 is provided at the end of one of the buffer bars 310 of any two adjacent buffer bars 310, and a protruding portion 312 is provided at the end of the other buffer bar 310, so that the two adjacent buffer bars 310 on the first wall surface 210 are spliced ​​and connected by the snap-fitting of the recessed portion 311 and the protruding portion 312, that is, the splicing of the two adjacent buffer bars 310 is connected by the snap-fitting of the recessed portion 311 and the protruding portion 312, thereby eliminating the splicing gap between the two adjacent buffer bars 310, making it difficult for the two adjacent buffer bars 310 to loosen, and strengthening the sealing of the annular structure formed by splicing all the buffer bars 310, thereby reducing the probability of the structural glue at the bottom of the box body 100 overflowing to the first wall surface 210 of the battery cell 200, thereby reducing the probability of structural damage to the battery cell 200, improving the use stability and reliability of the battery cell 200, and correspondingly improving the service life of the battery cell 200.

[0128] Since the electric device according to the embodiment of the present application is equipped with the above-mentioned battery device 10, the battery device 10 has reliability in use, which is beneficial to improving the reliability and service life of the electric device.

[0129] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0130] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery device, characterized in that: include: A box body, wherein the box body has a containing cavity; A plurality of battery cells, wherein the plurality of battery cells are arranged in the accommodation cavity along a first direction, and both surfaces of the battery cells along the first direction include a first wall surface; A buffer assembly, wherein the first wall surfaces of two adjacent battery cells are connected by the buffer assembly; Wherein, the buffer assembly includes a plurality of buffer strips, all of which are spliced ​​end to end in a ring shape along the circumferential edge of the first wall surface, and a recess is provided at the end of one of any two adjacent buffer strips, and a protrusion that engages with the recess is provided at the end of the other buffer strip.

2. The battery device according to claim 1, characterized in that: The first wall surface is a wall surface with the largest area on the battery cell.

3. The battery device according to claim 1, characterized in that: The recessed portion includes a plurality of sawtooth grooves connected in sequence, and the raised portion includes a plurality of sawtooth blocks connected in sequence, and the sawtooth blocks are correspondingly meshed with the sawtooth grooves.

4. The battery device according to claim 1, characterized in that: The recessed portion is configured as a groove, and the raised portion is correspondingly configured as a bulge.

5. The battery device according to claim 4, characterized in that: The recessed portion is configured as one of a rectangular groove, an arc-shaped groove, a T-shaped groove, and a trapezoidal groove, and the raised portion is correspondingly configured as one of a rectangular bump, an arc-shaped bump, a T-shaped bump, and a trapezoidal bump.

6. The battery device according to claim 1, characterized in that: The recessed portion is a step groove formed on the end of the buffer bar, and the raised portion is a step block formed on the end of an adjacent buffer bar.

7. The battery device according to claim 1, characterized in that: The recessed portion is an inclined surface formed on the end of the buffer strip, and the raised portion is a wedge block formed on the end of an adjacent buffer strip, and the wedge block and the inclined surface fit in a close fit.

8. The battery device according to any one of claims 1 to 7, characterized in that: The buffer strip has a third wall surface and a fourth wall surface that are arranged opposite to each other in the first direction, and the third wall surface and the fourth wall surface are provided with a first adhesive layer and a second adhesive layer, respectively.

9. The battery device according to any one of claims 1 to 7, characterized in that: Of the two adjacent buffer strips, one buffer strip is one of a rubber strip, a silicone strip and a plastic strip, and the other buffer strip is a foam strip.

10. An electrical device, characterized in that: The invention comprises a battery device as claimed in any one of claims 1 to 9, wherein the battery device is used to provide electrical energy.

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