Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device.The battery device comprises a box body, a battery monomer and a pressing strip, the box body comprises a first part and a second part, the first part and the second part are buckled to form a containing space, the battery monomer is arranged in the containing space, and the battery monomer comprises a shell and an end cover; the pressing strip is arranged on the side, facing the second part, of the first part and comprises at least two pressing plates, one pressing plate is bonded to the side, away from the shell, of the end cover, second knurling is arranged on the side, facing the end cover, of the pressing plate bonded to the end cover, and first knurling is arranged on the side, away from the shell, of the end cover. According to the scheme provided by the invention, the first knurling is arranged on the end cover, and the second knurling is arranged on the corresponding pressing plate, so that the actual contact area of a bonding interface can be increased after the pressing plate is bonded to the end cover, and the bonding capability between the pressing plate and the end cover is improved, so that the pressing strip and the end cover are kept stable during testing.

Description

TECHNICAL FIELD

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

[0002] With the increasing demand for energy density and integration efficiency of the battery pack, in order to improve the grouping efficiency of the battery pack, the battery cell is generally directly integrated into the battery pack.

[0003] In the battery pack level vibration impact test, due to the limited space of the upper end cover area of the battery cell, the glue area is small, which is easy to cause the bonding area between the upper end cover area of the battery cell and the pressure strip in the battery pack to be small, which is not conducive to the test. UTILITARIAN CONTENT

[0004] In view of the above problems, the present application provides a battery device and a power utilization device, which can solve the problem that the bonding area between the upper end cover area of the battery cell and the pressure strip in the battery pack is small, which is not conducive to the test.

[0005] To solve the above technical problems, in a first aspect, the present application provides a battery device, comprising:

[0006] A box body comprising a first part and a second part, the first part and the second part being buckled to form a containing space;

[0007] A battery monomer arranged in the containing space, the battery monomer comprising a shell and an end cover, the shell having an opening, and the end cover closing the opening;

[0008] A pressure strip arranged on one side of the first part facing the second part, the pressure strip comprising at least two pressure plates, two pressure plates being detachably connected along a first direction, wherein one of the pressure plates is bonded to one side of the end cover away from the shell, and the pressure plate bonded to the end cover is provided with a second embossing on one side facing the end cover, and the first direction is the height direction of the box body;

[0009] The side of the end cover away from the shell is provided with a first embossing.

[0010] In the technical scheme of the present application, the first embossing is arranged on the end cover, and the second embossing is arranged on one side of the pressure plate bonded to the end cover facing the end cover. When the pressure plate is bonded to the end cover, the actual contact area of the bonding interface can be increased, thereby improving the bonding capacity between the two, so that the pressure strip and the end cover remain stable during the test. At the same time, since the pressure strip comprises at least two pressure plates, the thickness of the overall pressure strip can be adjusted by detaching the corresponding pressure plate, so as to adapt to different thickness requirements.

[0011] In some embodiments, the first embossing and the second embossing are interlocked.

[0012] In this way, by limiting the first embossing and the second embossing to be interlocked, the mechanical engagement between the gasket and the end cover can be increased, and relative sliding between the gasket and the end cover during bonding due to vibration can be prevented.

[0013] In some embodiments, the first embossing and / or the second embossing is a continuous or discontinuous triangle, circle, strip, diamond, or cross.

[0014] In some embodiments, the depth of the first embossing and / or the second embossing is 0.05mm to 0.5mm, and the width is 0.1mm to 1mm.

[0015] By limiting the depth and width, not only can effective mechanical interlocking be ensured, but stress concentration or damage to the sealing of the end cover caused by too deep embossing, or poor results caused by too shallow embossing, can be avoided.

[0016] In some embodiments, the depth of the first embossing and / or the second embossing varies in a gradient along a second direction, wherein the second direction is from the front side to the rear side of the shell.

[0017] In this way, by using a gradient depth, the glue layer in the first embossing and the second embossing forms a "wedge-shaped anchor" when it solidifies, which can effectively expel air bubbles in the embossing, thereby reducing the porosity of the glue layer and improving the bonding strength.

[0018] In some embodiments, the battery device further comprises a thermally conductive glue disposed between the gasket and the end cover, and the thermally conductive glue fills the interlocking gap formed by the first embossing and the second embossing.

[0019] In this way, by using the thermally conductive glue, the thermal resistance between the end cover and the gasket can be reduced, thereby reducing the thermal resistance from the battery cell to the gasket and improving the heat dissipation efficiency of the battery cell.

[0020] In some embodiments, the gasket is provided with a bending portion at both ends along a second direction, and the bending portion is attached to the side surface of the shell along the second direction, wherein the second direction is from the front side to the rear side of the shell.

[0021] In this way, the contact area between the gasket and the shell can be increased, and the fixing effect on the battery cell can be improved. When the battery cell is subjected to vibration or external force impact, the bending portion can better constrain the displacement of the battery cell and prevent it from colliding. At the same time, the bending portion can also protect the bonding part of the gasket and the end cover to some extent, and can disperse external forces and reduce the stress on the bonding part.

[0022] In some embodiments, the pressing strip is provided with a positioning protrusion, and the end cover is provided with a positioning groove, and the positioning protrusion is matched with the positioning groove.

[0023] In this way, through the cooperation of the positioning protrusion and the positioning groove, the pressing strip can be quickly and accurately installed on the end cover, improving the assembly efficiency. At the same time, this positioning structure can also enhance the connection stability of the pressing strip and the end cover to a certain extent, prevent the displacement of the pressing strip on the end cover, and ensure the assembly quality and structural stability of the overall device.

[0024] In a second aspect, the application provides a power consumption device comprising the battery device as described in any one of the embodiments of the application.

[0025] The above description is only a summary of the technical solutions of the application. In order to enable the technical means of the application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the application to be more apparent and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the embodiments. The accompanying drawings are included to provide a description of the embodiments and are not meant to limit the scope of the application. Moreover, the same reference numerals in different drawings represent the same or similar elements. In the drawings:

[0027] Figure 1 Structure schematic diagram of a power consumption device provided by some embodiments of the application;

[0028] Figure 2 Structure schematic diagram of a battery provided by some embodiments of the application;

[0029] Figure 3 Structure schematic diagram of a battery cell provided by some embodiments of the application;

[0030] Figure 4 Schematic diagram of an end cover provided by some embodiments of the application;

[0031] Figure 5 Schematic diagram of the cooperation between an end cover and a pressing strip provided by some embodiments of the application;

[0032] Figure 6 Explosion diagram of Figure 5 ;

[0033] Figure 7 Schematic diagram of the bottom surface of an end cover provided by some embodiments of the application;

[0034] Figure 8 Schematic diagram of the bottom surface of a pressing strip provided by some embodiments of the application;

[0035] Figure 9 A schematic view of a baffle provided for some embodiments of the present application;

[0036] Figure 10 A schematic view of a first embossing being triangular provided for some embodiments of the present application;

[0037] Figure 11 A schematic view of a first embossing being circular provided for some embodiments of the present application;

[0038] Figure 12 A schematic view of a first embossing being strip-shaped provided for some embodiments of the present application;

[0039] Figure 13 A schematic view of a first embossing being cross-shaped provided for some embodiments of the present application.

[0040] Reference signs in the detailed description of the embodiments are as follows:

[0041] 1000, vehicle;

[0042] 100, battery; 200, controller; 300, motor;

[0043] 110, box body; 111, first part; 112, second part; 120, battery cell; 121, shell; 122, end cover; 123, electrode assembly;

[0044] 130, first embossing;

[0045] 140, baffle; 141, second embossing; 142, pressing plate. DETAILED DESCRIPTION

[0046] The embodiments of the technical solutions of the present application will be described in detail below in conjunction with the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein are only for the purpose of describing specific embodiments of the present application, and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion.

[0048] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly specified and limited.

[0049] Reference herein to "embodiments" means that the particular features, structures, or characteristics described in connection with the embodiments can be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily a separate or alternative embodiment to other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0050] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after it.

[0051] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0052] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0053] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0054] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0055] With the increasing demand for energy density and integration efficiency of the battery pack, in order to improve the grouping efficiency of the battery pack, the battery cell is generally integrated directly into the battery pack.

[0056] In the battery pack level vibration impact test, the bottom of the battery cell can be completely bonded to the inner bottom surface of the battery pack, and the end cap area on the battery cell becomes the weak point in the battery pack level vibration impact test due to the small area of the adhesive.

[0057] Based on the above considerations, in order to solve the problem that the bonding area of the end cap area on the battery cell and the pressure strip in the battery pack is small and is not conducive to testing, a battery device is designed, which comprises a box body, a battery monomer and a pressure strip, wherein the box body comprises a first part and a second part, the first part and the second part are buckled to form a containing space, the battery monomer is arranged in the containing space, the battery monomer comprises a shell and an end cap, the shell has an opening, the end cap closes the opening, the pressure strip is arranged on one side of the first part facing the second part, the pressure strip comprises at least two pressure plates, the two pressure plates are detachably connected along a first direction, one of the pressure plates is bonded to one side of the end cap away from the shell, and the pressure plate bonded to the end cap is provided with a second embossing on one side facing the end cap, and the first direction is the height direction of the box body; the end cap is provided with a first embossing on one side away from the shell.

[0058] In the technical scheme of the embodiment of the application, the first embossing is arranged on the end cap, and the second embossing is arranged on one side of the pressure plate bonded to the end cap facing the end cap. When the pressure plate is bonded to the end cap, the actual contact area of the bonding interface can be increased, so as to improve the bonding capacity between the two, so that the pressure strip and the end cap can be kept stable during testing. At the same time, since the pressure strip comprises at least two pressure plates, the thickness of the overall pressure strip can be adjusted by detaching the corresponding pressure plate, so as to adapt to different thickness requirements.

[0059] The battery in the application refers to a single physical module comprising one or more battery monomers to provide higher voltage and capacity. For example, the battery mentioned in the application can comprise a battery pack and the like. The battery can be used as a power supply or a power supply system of an electric device, so as to improve the overall performance of the battery and facilitate the promotion of the battery.

[0060] The above power consuming device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0061] The following embodiments are described by taking a power consuming device of an embodiment of the present application, i.e., a vehicle 1000, as an example for convenience of description.

[0062] Please refer to Figure 1 , Figure 1 A structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery 100, which can be arranged at the bottom, the head, or the tail of the vehicle 1000. The battery 100 can be used for power supply of the vehicle 1000, for example, the battery 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0063] In some embodiments of the present application, the battery 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0064] Please refer to Figure 2 , Figure 2This is an exploded view of a battery 100 provided in some embodiments of this application. The battery 100 includes a housing 110 and a battery cell 120, with the battery cell 120 housed within the housing 110. The housing 110 provides a accommodating space for the battery cell 120, and the housing 110 can adopt various structures. In some embodiments, the housing 110 may include a first portion 111 and a second portion 112, which overlap each other, and together define a accommodating space for accommodating the battery cell 120. The second portion 112 may be a hollow structure with one open end, and the first portion 111 may be a plate-like structure, with the first portion 111 covering the open side of the second portion 112 so that the first portion 111 and the second portion 112 together define the accommodating space; alternatively, the first portion 111 and the second portion 112 may both be hollow structures with one open side, with the open side of the first portion 111 covering the open side of the second portion 112. Of course, the box 110 formed by the first part 111 and the second part 112 can be of various shapes, such as a cylinder, a cuboid, etc.

[0065] In battery 100, there can be multiple battery cells 120. These multiple battery cells 120 can be connected in series, parallel, or in a mixed configuration. A mixed configuration means that multiple battery cells 120 are connected in both series and parallel. Multiple battery cells 120 can be directly connected in series, parallel, or in a mixed configuration, and then the entire assembly of the multiple battery cells 120 is housed within housing 110. Alternatively, battery 100 can also consist of multiple battery cells 120 first connected in series, parallel, or in a mixed configuration to form a battery module, and then multiple battery modules are connected in series, parallel, or in a mixed configuration to form a whole, which is also housed within housing 110. Battery 100 may also include other structures; for example, battery 100 may also include a busbar component for electrical connection between multiple battery cells 120.

[0066] Each battery cell 120 can be a secondary battery or a primary battery; it can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited to these. The battery cell 120 can be cylindrical, flat, cuboid, or other shapes.

[0067] like Figure 3 As shown, the battery cell 120 may include a housing, an electrode assembly 123, and electrode terminals. The housing includes a casing 121 and an end cap 122. The casing 121 has an opening, and the end cap 122 closes the opening to isolate the internal environment of the battery cell 120 from the external environment.

[0068] The shell 121 is a component for fitting the end cover 122 to form an internal environment of the battery cell 120, wherein the formed internal environment can be used to accommodate the electrode assembly 123, electrolyte and other components. The shell 121 and the end cover 122 can be independent components. The shell 121 can be of various shapes and sizes. Specifically, the shape of the shell 121 can be determined according to the specific shape and size of the electrode assembly 123. The material of the shell 121 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0069] The end cover 122 refers to a component that covers the opening of the shell 121 to isolate the internal environment of the battery cell 120 from the external environment. Without limitation, the shape of the end cover 122 can be adapted to the shape of the shell 121 to fit the shell 121. Optionally, the end cover 122 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 122 is not easily deformed when subjected to extrusion collision, so that the battery cell 120 can have higher structural strength, and the reliability can also be improved. The end cover 122 can be provided with functional components such as electrode terminals. The electrode terminals can be used to electrically connect with the electrode assembly 123 for outputting or inputting the electrical energy of the battery cell 120. The material of the end cover 122 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application. In some embodiments, an insulating structure can also be provided on the inner side of the end cover 122, which can be used to isolate the electrical connection components in the shell 121 from the end cover 122 to reduce the risk of short circuit. Exemplarily, the insulating structure can be plastic, rubber, etc.

[0070] The electrode assembly 123 is a component in which electrochemical reactions occur in the battery cell 120. One or more electrode assemblies 123 can be contained in the shell 121. The electrode assembly 123 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and generally has a separator film between the positive electrode sheet and the negative electrode sheet, which is used to separate the positive electrode sheet and the negative electrode sheet to avoid internal short circuit of the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion of active material constituting the main body of the electrode assembly 123, and a portion without active material constituting the tab of the positive electrode sheet and the negative electrode sheet, respectively. The positive electrode tab and the negative electrode tab can be located at one end of the main body or at two ends of the main body, respectively. During the charging and discharging process of the battery 100, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals to form a current loop. In addition, the electrode assembly 123 can be of a winding type structure or a stacking type structure.

[0071] In some embodiments, the battery cell 120 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 120 when the internal pressure or temperature of the battery cell 120 reaches a threshold value.

[0072] According to some embodiments of the present application, as Figure 4 and in combination with Figure 5 , Figure 6 , Figure 7 and Figure 8 shown, the present application provides a battery device, which comprises a box body 110, a battery monomer 120 and a pressing strip 140, wherein the box body 110 comprises a first part 111 and a second part 112, the first part 111 and the second part 112 are buckled to form a containing space, the battery monomer 120 is arranged in the containing space, the battery monomer 120 comprises a shell 121 and an end cover 122, the shell 121 has an opening, the end cover 122 closes the opening, the pressing strip 140 is arranged on the side of the first part 111 facing the second part 112, the pressing strip 140 comprises at least two pressing plates 142, the two pressing plates 142 are detachably connected along a first direction, one of the two pressing plates 142 is bonded to the side of the end cover 122 away from the shell 121, and the pressing plate 142 bonded to the end cover 122 is provided with a second embossing 141 on the side facing the end cover 122, the first direction is the height direction of the box body 110; the side of the end cover 122 away from the shell 121 is provided with a first embossing 130.

[0073] The structure of the first part 111, the second part 112 and the battery monomer 120 in the present embodiment can refer to the description above, which will not be repeated here.

[0074] The present embodiment can only provide the first embossing 130 on the end cover 122, or only provide the second embossing 141 on the pressing plate 142, or provide the first embossing 130 on the end cover 122 and the second embossing 141 on the pressing plate 142. For the convenience of explanation, the following will be described by taking the example of providing the first embossing 130 on the end cover 122 and the second embossing 141 on the pressing plate 142.

[0075] The shape of the first embossing 130 and the second embossing 141 in the present embodiment can be circular, square, etc., which is not limited here.

[0076] The pressing strip 140 in the present embodiment can comprise two, three or more pressing plates, which can refer to Figure 9 , wherein the bottom surface of the bottommost pressing plate 142 is provided with the second embossing 141.

[0077] In the present embodiment, the two adjacent pressing plates 142 along the height direction can be connected together through the structure of the clamping groove and the clamping block, which can be determined according to the actual situation, and the present specification embodiment does not limit it. In this way, the thickness of the whole pressing strip 140 can be adjusted by disassembling the corresponding pressing plate 142, so as to adapt to different thickness requirements.

[0078] In assembly, by setting the first embossing 130 on the end cover 122, setting the second embossing 141 on the side of the pressing plate 142 which is close to the end cover 122, and after the corresponding pressing plate 142 is adhered to the end cover 122, the actual contact area of the adhesive interface can be increased, so as to improve the adhesive capacity between the two, so that the pressing strip 140 and the end cover 122 can be kept stable during testing.

[0079] Referring to the following table

[0080]

[0081] As can be seen from the above table, by increasing the embossing structure between the pressing strip 140 and the end cover 122, the shear strength is increased by about 40%, and the adhesive performance is obviously improved. Moreover, the thickness of the overall pressing strip 140 can be adjusted by disassembling the corresponding pressing plate 142, so as to adapt to different thickness requirements.

[0082] According to some embodiments of the present application, the first embossing 130 and the second embossing 141 are mutually embedded.

[0083] The first embossing 130 and the second embossing 141 in the embodiment can be embedded together by the structure of protrusions and grooves, which is not limited here.

[0084] In this way, by limiting the first embossing 130 and the second embossing 141 to be mutually embedded, the mechanical engagement force between the pressing strip 140 and the end cover 122 can be increased, so as to prevent the relative sliding of the pressing strip 140 and the end cover 122 due to vibration during adhesion.

[0085] According to some embodiments of the present application, as Figure 10 and in combination with Figure 11 , Figure 12 and Figure 13 , the first embossing 130 and / or the second embossing 141 are continuous or intermittent triangular, circular, strip-shaped, diamond-shaped or cross-shaped.

[0086] When the first embossing 130 and / or the second embossing 141 are not circular structures, stress concentration leading to cracking of the adhesive layer can be avoided.

[0087] According to some embodiments of the present application, the depth of the first embossing 130 and / or the second embossing 141 is 0.05mm to 0.5mm, and the width is 0.1mm to 1mm. By limiting the depth and width, not only the effective mechanical embedding can be ensured, but also the stress concentration or damage to the sealing property of the end cover caused by too deep embossing can be avoided, and the effect is not good if it is too shallow.

[0088] According to some embodiments of the present application, the depth of the first embossing 130 and / or the second embossing 141 varies along a second direction, wherein the second direction is a direction from the front side to the back side on the shell 121.

[0089] The second direction in the present embodiment can refer to the X-axis direction in the above description. Figure 6

[0090] The gradient depth enables the glue layer in the first embossing 130 and the second embossing 141 to form a "wedge-shaped anchoring" when cured, so as to effectively expel the air bubbles in the embossing, thereby reducing the porosity of the glue layer and improving the adhesion.

[0091] According to some embodiments of the present application, the battery device further comprises a thermally conductive glue (not labeled in the figure) arranged between the pressing strip 140 and the end cover 122, and the thermally conductive glue fills the interfitting gap formed by the first embossing 130 and the second embossing 141.

[0092] In this way, the thermally conductive glue reduces the thermal resistance between the end cover 122 and the pressing strip 140, thereby reducing the thermal resistance from the battery cell to the pressing strip 140 and improving the heat dissipation efficiency of the battery cell.

[0093] According to some embodiments of the present application, the pressing strip 140 is provided with a bending portion (not labeled in the figure) at both ends along a second direction, and the bending portion is attached to the side surface of the shell 121 along the second direction, wherein the second direction is a direction from the front side to the back side on the shell 121.

[0094] The second direction in the present embodiment can refer to the above description, which will not be repeated here.

[0095] The present embodiment can increase the contact area between the pressing strip 140 and the shell 121 by providing the bending portion at both ends of the pressing strip 140 along the second direction, thereby improving the fixing effect on the battery monomer. When the battery monomer is subjected to vibration or external force impact, the bending portion can better constrain the displacement of the battery monomer and prevent it from colliding. At the same time, the bending portion can also play a certain protective role on the bonding part of the pressing strip 140 and the end cover 122, thereby dispersing the external force and reducing the stress borne by the bonding part.

[0096] According to some embodiments of the present application, the pressing strip 140 is provided with a positioning protrusion, and the end cover 122 is provided with a positioning groove, and the positioning protrusion cooperates with the positioning groove. In this way, the cooperation of the positioning protrusion and the positioning groove can enable the pressing strip 140 to be quickly and accurately installed on the end cover 122, thereby improving the assembly efficiency. At the same time, this positioning structure can also enhance the connection stability of the pressing strip 140 and the end cover 122 to a certain extent, thereby preventing the displacement of the pressing strip 140 on the end cover 122 and ensuring the assembly quality and structural stability of the overall device.

[0097] ​The application also provides a battery device.

[0098] The specific structure of the battery device in the embodiment is referred to the above embodiments, and since all the technical solutions of the above embodiments are adopted in the electric device, all the beneficial effects brought by the technical solutions of the above embodiments are at least possessed, and thus will not be repeated here.

[0099] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the application, but not to limit them; although the application has been described in detail with reference to the above embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the application, and they should be covered in the scope of the claims and the description of the application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The application is not limited to the specific embodiments disclosed in the text, but includes all the technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized by, The battery device comprises: a box body comprising a first part and a second part, the first part and the second part being buckled to form a containing space; a battery cell arranged in the containing space, the battery cell comprising a shell and an end cover, the shell having an opening, and the end cover closing the opening; a pressing strip arranged on one side of the first part facing the second part, the pressing strip comprising at least two pressing plates, the two pressing plates being detachably connected in a first direction, one of the pressing plates being bonded to one side of the end cover away from the shell, and the pressing plate bonded to the end cover being provided with a second embossing on a side facing the end cover, the first direction being a height direction of the box body; the end cover being provided with a first embossing on a side away from the shell.

2. The battery device according to claim 1, characterized by The first embossing and the second embossing are mutually embedded.

3. The battery device of claim 1, wherein The first embossing and / or the second embossing are continuous or intermittent triangular, circular, strip-shaped, diamond-shaped or cross-shaped.

4. The battery device according to claim 1 or 3, characterized by The first embossing and / or the second embossing have a depth of 0.05mm to 0.5mm and a width of 0.1mm to 1mm.

5. The battery device of claim 1, wherein The depth of the first embossing and / or the second embossing changes in a second direction, the second direction being a direction from the front side to the back side of the shell.

6. The battery device of claim 1, wherein The battery device further comprises a heat-conducting adhesive arranged between the pressing strip and the end cover, and the heat-conducting adhesive being filled in the embedded gap formed by the first embossing and the second embossing.

7. The battery device of claim 1, wherein The pressing strip is provided with a bending part at both ends in the second direction, the bending part being fitted with the side surface of the shell in the second direction, the second direction being a direction from the front side to the back side of the shell.

8. The battery device of claim 1, wherein The pressing strip is provided with a positioning protrusion, and the end cover is provided with a positioning groove, the positioning protrusion being matched with the positioning groove.

9. An electrical device, characterized by The battery device comprises any one of claims 1 to 8.

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